(Test Bank) Basic Anatomy And Physiology

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EXAMINATION & QUESTIONS IN BASIC ANATOMY AND PHYSIOLOGY MARTIN CAON , 2ND EDITION 2400 Multiple Choice Questions and Answers Complete Test Bank | Latest 2022 2 Table of Contents 1 Organisation of the Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Cells and Tissues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 Cells and Tissues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 Cell Cycle (Mitosis and Protein Synthesis) . . . . . . . . . . . . . . . . . . . 34 3 Measurement, Errors, Data and Unit Conversion . . . . . . . . . . . . . . . . 41 4 Chemistry for Physiology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.1 Atoms and Molecules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 4.2 Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 4.3 Diffusion and Osmosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4 Tonicity, Moles and Osmoles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 4.5 Acids, Bases and Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 4.6 Organic Chemistry and Macromolecules. . . . . . . . . . . . . . . . . . . . . 114 5 Integument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 6 Homeostasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 7 Skeleton and Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151 8 Muscles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173 9 Gastrointestinal System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 10 Endocrine System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 11 Renal System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251 12 Cardiovascular System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 12.1 Blood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 12.2 Heart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 12.3 Blood Vessels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 309 12.4 Pressure: The Physics of Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 323 12.5 Pressure Applied to the Cardiovascular System . . . . . . . . . . . . . . 336 12.6 Blood Pressure and Its Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 349 13 Respiratory System ................................ ................................ .................... 369 13.1 Anatomy and Physiology ................................ ................................ ..369 13.2 Pressure Applied to the Respiratory System ................................ .....393 14 Nervous System ................................ ................................ .......................... 405 14.1 Cells and Action Potential ................................ ................................ .405 14.2 Brain and Spinal Cord Anatomy ................................ ....................... 420 14.3 Autonomic Nervous System, Neurotransmitters, and Reflexes ........ 440 14.4 Special Senses (Eye and Ear) ................................ ............................ 454 14.4.1 Eye ................................ ................................ ........................ 454 14.4.2 Ear ................................ ................................ ......................... 465 15 Reproductive System ................................ ................................ ................. 475 16 Waves, Light Wave s, Sound Waves and Ultrasound (The Physics of) ................................ ................................ .......................... 493 16.1 Waves ................................ ................................ ................................ 493 16.2 Light Waves ................................ ................................ ...................... 498 16.3 Sound ................................ ................................ ................................ 502 16.4 Ultrasound ................................ ................................ ......................... 506 17 Ionising Radiation ................................ ................................ ...................... 511 17.1 Medical Imaging with X -Radiation ................................ .................. 511 17.2 Radioactivity, Radiotherapy, Nuclear Medicine and Radiation Safety ................................ ................................ ......... 519 18 Electricity ................................ ................................ ................................ ....539 19 Biomechanics ................................ ................................ .............................. 551 20 Body Temperature, Energy and Heat Loss ................................ .............. 567 21 Essay Topics for a Written Assignment Assessment in Anatomy and Physiology ................................ ................................ .......585 Chapter 1 Organisation of the Body 1. Which of the listed terms is described by: “All the chemical processes that take place in the organelles and cytoplasm the cells of the body”? A. Metabolism B. Cellular respiration C. Homeostasis D. Physiology Answer is A: The quoted statement is a definition of metabolism. 2. Which major organ lies deep to the right hypochondriac region? A. The stomach B. The spleen C. The liver D. The duodenum Answer is C: Hypochondriac = below the rib cartilage; liver is located mostly on the right side. 3. Which plane of the body divides it into dorsal and ventral regions? A. Transverse B. Axial C. Coronal D. Sagittal Answer is C: Dorsal and ventral = front and back – a coronal section so divides the body into the se sections. 4. To which of the following does the “tissue level” of structural organisation refer? A. Atoms, ions, molecules and electrolytes B. Mitochondria, ribosomes, nucleus, endoplasmic reticulum C. Nephron, alveolus, villus, lobule 4 D. Muscle, nervous, connective, epithelial Answer is D : The listed structures are the four major tissue types. 5. The directional term “superior” in anatomy means which of the following? A. Cephalic B. Ventral C. Closer to the top of the head D. Closer to the skin surface Answer is C: Cephalic refers to the head region, while superior refers to being closer to the head than is the other anatomical structure in question. 6. Which of the following is the best definition of physiology? A. The microscopic study of tissues and cells B. The study of how the body works C. All the chemical processes that take place in the organelles of the body’s cells D. The body’s automatic tendency to maintain a relatively constant internal environment Answer is B: Physiology is indeed the study of how the (healthy) body functions. 7. The “anatomical position” could be described as which of the following? A. Lying down prone B. Lying down supine C. Standing displaying the ventral surface of the body D. Standing with arms and legs abducted Answer is C: This is the best answer. Standing is required, as is having the arms hanging parallel to the sides, with palms facing forward. 8. Which choice best describes the location of the majority of the musculoskeletal system? A. It is in the dorsal cavity B. It is in the ventral cavity C. It is in the abdominopelvic cavity D. It is not located in a body cavity Answer is D: The musculoskeletal system is located in the arms and legs, and sur- rounding, but outside of the abdominopelvic, the thoracic and the dorsal cavities. 9. Which of the following is/are the contents of the ventral cavity? A. Heart and lungs B. Brain and spinal cord C. Viscera D. Gut, kidneys, liver, pancreas, spleen, bladder, internal reproductive organs Answer is C: This is the best answer. It is a collective term for all organs in the tho- racic and abdominopelvic cavities. 10. Which of the stated relationships is correct? A. The heart is inferior to the clavicle B. The shoulder is distal to the carpals C. The phalanges are proximal to the metacarpals D. The eye is medial to the eyebrows Answer is A: The heart is indeed below (inferior) to the clavicle. All other choices are wrong. 11. Which of the following is/are the contents of the dorsal body cavity? A. Heart and lungs B. Brain and spinal cord C. Viscera D. Gut, kidneys, liver, pancreas, spleen, bladder, internal reproductive organs Answer is B: Dorsal refers to the back, the cavity enclosed by the skull and vertebrae. 12. Which of the stated relationships is correct? A. The heart is superior to the large intestine B. The shoulder is distal to the metacarpals C. The phalanges are proximal to the carpals D. The eye is medi al to the nose Answer is A: The heart is indeed above (superior) to the intestine. All other answers are wrong. 13. What is the study of how body parts function called? A. Histology B. Physiology C. Homeostasis D. Metabolism Answer is B: Physiology refers to function. 14. Which of the following correctly describes the two named body parts? A. The elbow is proximal to the shoulder B. The phalanges are distal to the carpals C. The ribs are proximal to the sternum D. The elbow is distal to the knee Answer is B: Phalanges (finger bones) are indeed further from the trunk along the arm, than are the carpals (wrist bones). 15. Which one of the following statements is correct? A. The diaphragm separates the brain and spinal cord. B. The ventral cavity contains the male and female reproductive system. C. The abdominopelvic cavity contains the spinal cord. D. The dorsal cavity contains the brain and spinal cord. Answer is D: Dorsal means back and that is the cavity with the spinal cord and brain. B is incorrect as the genitalia are outside the ventral cavity. 16. Comple te the sentence correctly: “Cervical vertebrae are…… A. Superior to the rib cage 6 B. Inferior to the thoracic vertebrae C. Located between the thoracic and sacral vertebrae D. Fused into a single bone called the sacrum Answer is A: Cervix refers to “neck”. The cervical vertebrae are in the neck; hence they are above (superior) to the rib cage. 17. The dorsal body cavity contains which of the following organs? A. The brain B. The brain and spinal cord C. The brain, spinal cord and heart D. The brain, spinal cord, heart and kidneys Answer is B: Dorsal refers to the back and is opposite to ventral. Only the brain and spinal cord occupy the dorsal cavity. All other answers are incorrect. 18. What does the process known as anabolism refer to? A. The use of energy for producing chemical substances B. The breaking down phase of metabolism C. All the chemical process that take place in the organelles of the cells D. The supply of nutrients to the body’s cells Answer is A : Anabolism refers to the process of constructing/building molecules (think anabolic stero ids). B refers to catabolism. C is metabolism. 19. To what does the term “hypochondriac” refer? A. A condition of having too few chondria B. The region of abdomen inferior to the ribs C. A person who often complains of an ailment D. Having insufficient cartilage in the knees Answer is B: In this case “hypo -” means below, while “chondro” refers to the carti- lage joining the ribs to the sternum (the costal cartilages). The regions of the abdo - men immediately inferior to these rib cartilages (on the left and right sides of the body) are what is being referred to. 20. If a medical image displays internal anatomy in the midsagittal section, which of the following describes the section? A. A vertical section through the nose and umbilicus that divides the body into right and left halv es B. A cross -section through the midriff at about the level of the liver C. A cross -section through the upper chest at about the level of the shoulders D. A vertical section through the midpoint of the clavicle and through either the right or left thigh Answer is A: A sagittal section divides the body into left and right portions. A mid- sagittal section means that the dividing line is in the vertical midline of the body so that the halves are equal. 21. Which of the following best describes the “anatomical position”? A. Standing vertically, arms held horizontally, legs apart so that the tips of the head, hands and feet lie on an imaginary circle, drawn around the body B. Standing “to attention”, with hands held so that thumbs are ventral while the fifth digit is dorsal C. Stand ing “at ease” with hands clasped behind your back while adjacent and dorsal to the sacrum D. Standing vertically, arms parallel and lateral to the ribs with hands inferior to the elbows and supinated Answer is D: The anatomical position is achieved when standing with feet comfort - ably apart while displaying the ventral surface of the head, body and forearms to the same direction (forwards). 22. Which term describes the location of the adrenal glands with reference to the kidneys? A. Proximal B. Distal C. Superior D. Inferi or Answer is C: The adrenal glands are on the cephalic side of the kidneys. Being closer to the head, they are termed “superior to the kidneys”. 23. Which of the following terms is NOT used to identify a region of the abdomen? A. Left hypochondriac B. Hypogastric C. Epigastric D. Right sacral Answer is D: Right sacral is not a region on the anterior surface of the abdomen. 24. What structure separates the thoracic cavity from the abdominal cavity? A. The mediastinum B. The diaphragm C. The peritoneum D. The pylorus Answer is B: The muscul ar diaphragm physically separates these two ventral cavities. 25. When the body is standing in the “anatomical position”, which of the following is true? A. The radius is lateral to the ulna. B. The radius is medial to the ulna. C. The radius is proximal to the ulna. D. The radius is distal to the ulna. Answer is A: In the anatomical position, the palms are displayed ventrally. The radius is further from the body’s midline than is the ulna; hence, it is lateral to the ulna. 26. What is the movement called when the arms are mov ed from the anatomical position by sweeping them through 90° in the coronal plane, so that they are held horizontally (parallel to the ground)? 8 A. Pronation B. Circumduction C. Abduction D. Rotation Answer is C: Moving the straight arms away from the body in this fashion is called abduction. 27. Which bones are located distal to the elbow and proximal to the wrist? A. The carpals B. The radius and ulna C. The tarsals D. The humerus Answer is B: Distal to the elbow means further along the arm towards the hand – this eliminates the humerus. Proximal to the wrist means closer to the body than the wrist – this eliminates the carpals. The tarsals are in the ankle. 28. What is the collective term used for contents of the body’s ventral cavity? A. The omentum B. The peritoneum C. The internal organs D. The viscera Answer is D: The peritoneum is the membrane that surrounds the abdominal cavity and the omentum is a portion of that. The internal organs are close but also include the brain which is not in the ventral cavity. 29. What is meant by the term “retroperi toneal”? A. On the dorsal side of the lungs B. In the space between the spinal cord and the bodies of the vertebrae C. Within the body wall but not enclosed by the peritoneum D. It is a small bone of the facial skeleton Answer is D: Retroperitoneal refers to organs in ferior to the diaphragm but not enclosed by the peritoneum. For example, the kidneys, pancreas, rectum and part of the duodenum. 30. How does a coronal section divide the body? A. Into many transverse slices B. Into a ventral part and a dorsal part C. Into a left and r ight section D. Into superior and inferior portions Answer is B: An imaginary cut that divides the body into a front half (or section) and back half is termed coronal. Choice C is sagittal, while choice D is a transverse section. 31. What structure separates the abdominal and pelvic cavities? A. There is no separating structure. B. The diaphragm. C. The peritoneum. D. The dura mater. Answer is A: The pelvic cavity is not physically separated from the abdominal cav- ity. For example, parts of the small intestine are located in both “cavities”. 32. In which cavity(ies) does the digestive system lie? A. The abdominal cavity B. The abdominal and pelvic cavities C. The thoracic, abdominal and pelvic cavities D. The dorsal, thoracic, abdominal and pelvic cavities Answer is C: The oesophagus is within the thoracic cavity, while the remainder is in the abdominopelvic cavity. 33. Imagine an image of a transverse section of the upper arm. What tissues may be identified there located from the most superficial to the deepest? A. Skin, subcutaneous fat, muscle, hypodermis, bone B. Epidermis, dermis, hypodermis, muscle, bone C. Integument, muscle, superficial fascia, bone, marrow D. Hypodermis, subcutaneous fat, muscle, marrow, bone Answer is B: Choice A is incorrect as hypodermis is more superficial than muscle. Choice C is wrong again because superficial fascia (which is a synonym for hypo - dermis) is more superficial than muscle. Choice D is wrong as marrow lies within bone, and also hypodermis and subcutaneous fat are almost synonyms. 34. By what anatomical term is the head region known? A. Plantar B. Cephalic C. Hypochondriac D. Axillary Answer is B: The cephalus is the head; the plantar region is the base of the foot; the hypochondriac region is inferior and deep to the rib cartilages of ribs 7–10; the axil- lary region is the “armpi t”. 35. Which organ would be found in the left hypochondriac region? A. The appendix B. The urinary bladder C. The liver D. The stomach Answer is D: Left hypochondriac region is deep to the cartilages of the lower ribs on our left -hand side. The stomach is closest to th is region. 36. To which body region does “popliteal” refer? A. The region around each eye B. The region anterior to the elbow, between arm and forearm C. The region dorsal to the knee D. The region of the anterior crease between thigh and abdomen Answer is C: Here the popliteal artery and popliteus tendon may be located. Choice 10 A refers to orbital; B refers to antecubital; D refers to inguinal. 37. Which region of the body is known as the acromial region? A. The elbow region B. The heel region C. The medial ankle region D. The shoulder region Answer is D: The superior part of the shoulder at the distal end of the clavicle is known as acromial. Here the acromion of the scapula articulates with the clavicle at the “ac” or acromioclavicular joint. Choice A is the olecranal region; B the calca - neal; C (the medial malleolus) is not usually ascribed a region name. 38. What are the terms cortex and medulla used to describe? A. The cortex is the outer part of an organ or bone, while the medulla is the inner part. B. The cortex is the inner part of an organ or bone, while the medulla is the outer part. C. The cortex is the deeper part of an organ or bone, while the medulla is the more superficial part. D. The medulla refers to the fibrous capsule around an organ, while the cortex is the tissue of an organ. Answer is A: The cortex of the kidney, for example, is the deep, inner part, while the cortex is the more superficial, outer part. 39. What is meant by the term flexion (or to flex)? A. Flexion is where the angle between two long bones is decreased by muscle action. B. Flexion is an action performed to stretch (extend) a muscle. C. Flexion is where the angle between two long bones is increased by muscle action. D. Flexion is caused by the action of contracting a muscle. Answer is A: To flex an arm is to decrease the angle between the humerus and radius (by contracting the biceps brachii). Choice D is wrong as contracting the triceps brachii causes extension of the forearm. 40. To what movement is the term “extension” applied? A. Extension is where the angle between two long bones is decreased by mus- cle action. B. Extension is an action performed to stretch (extend) a muscle. C. Extension is where the angle between two long bones is increased by mus - cle action. D. Extension occurs when an antagonistic muscle is allowed to contract. Answer is C: To extend a body part is to increase the angle between the moving bone and the stationary bone. For example, when the fingers of a clenched fist are allowed to straighten, the angle between the proximal phalanges and the metacar - pals increases. 41. What exis ts in the “potential space” between the visceral and parietal layers of a membrane? A. Serous fluid B. Nothing C. Air D. Synovial fluid Answer is A: Serous membranes have a deeper visceral layer and a more superficial parietal layer. Between them is a small amount of serous fluid to lubricate their movement past each other. 42. One of the images taken for mammography of the compressed breast is known as “cranio -caudal”. What direction is this? A. Compression from the medial and lateral sides. B. A left to right (sideways) view. C. The breast is flattened against the rib cage for imaging. D. When standing, the breast is compressed from above and below. Answer is D: From above (the cranial direction) and below (the caudal, or tail direction). 43. What part of the body is known as the poplite al region? A. The fold of the knee B. The fold of the elbow C. The area around the ears D. The medial sides of the ankles Answer is A: Behind the knee, opposite to the patella is the popliteal region. Here the popliteal pulse and popliteus tendon are found. Chapter 2 Cells and Tissues 2.1 Cells and Tissues Cells are composed of their cytoplasm, which includes the cytosol and organelles, the nucleus and the surrounding plasma membrane. You should know that the plasma membrane is a double layer of phospholipid molec ules and that these mol - ecules have a hydrophilic end and a hydrophobic end. The plasma membrane con - tains proteins including the ATPase (the sodium -potassium pump) which moves sodium ions out of the cell while moving potassium ions into the cell. Other proteins act as receptors and as pores or gateways into the cell. You should know the names 12 and function of some of the organelles within cells. For example, you should know that mitochondria produce ATP and that ribosomes synthesise proteins from amino acids. You will become familiar with the names of many cells. Often a word can be recognised as the name of a cell because it ends in “ -cyte” or, if it is an immature cell, by ending in “ -blast”. Four major types of tissue are identified in the body: epithel ial, connective, muscle and neural tissues. Of course there are many subtypes within these categories. For example, epithelial tissue may be squamous, cuboidal, columnar or glandular. Muscle may be skeletal, smooth or cardiac. Connective tis - sue is quite varied, and you should be aware of the many different examples of tis - sue that are categorised as “connective”. For example, blood, bone, dermis, cartilage and tendon are all connective tissues. 1. Which structure within the cell produces ATP (adenosine triphosphate)? A. The mitochondria B. The nucleus C. Peripheral proteins D. The endoplasmic reticulum Answer is A: This is a basic function of mitochondria. All other answers are wrong. © Springer International Publishing AG, part of Springer Nature 2018 11 M. Caon, Examination Questions and Answers in Basic Anatomy and Physiology , https://doi.org/10.1007/978 -3-319-75599 -1_2 2. Which of the following is NOT a component of the cell plasma membrane? A. Cholesterol B. Proteins C. Microfilaments D. Phospholi pids Answer is C: Microfilaments occur inside the cell. 3. Which list below contains the four types of tissue? A. Extracellular fluid, skeletal tissue, glandular tissue, connective tissue B. Extracellular fluid, muscle tissue, glandular tissue, cartilaginous tissue C. Neural tissue, skeletal tissue, epithelial tissue, cartilaginous tissue D. Neural tissue, muscle tissue, epithelial tissue, connective tissue Answer is D: These are the four types. Extracellular fluid is not a tissue. Cartilage is a type of connective tissue . 4. Except for one, the following are types of cells. Which one is NOT a type of cell? A. Platelets B. Leucocytes C. Macrophages D. Osteoblasts Answer is A: Platelets are fragments of a cell (a megakaryocyte) bound by a membrane. 5. In which part of a cell does the process of making ATP from oxygen and glucose take place? A. Lysosomes B. Ribosomes C. Mitochondria D. Golgi apparatus Answer is C: ATP production is the function of mitochondria. 6. Which of the following is a function of membrane proteins? A. To process lipids and proteins for secretion through the plasma membrane B. To act as receptors for hormones C. To synthesise proteins from amino acids D. To act as a cytoskeleton to support and shape the cell Answer is B: One function of membrane proteins is to receive (amino acid-based) hormones th at cannot pass through the plasma membrane. 7. What is the difference between simple squamous cells and simple columnar cells? A. Squamous cells are flattened, while columnar cells are taller than they are wide. B. Simple squamous cells are one layer thick, while simple columnar cells are several layers thick. C. Simple squamous cells are epithelial tissue, while simple columnar cells are connective tissue. D. Squamous cells are flattened, while columnar cells are cuboidal. Answer is A: The names of the cells contain a description of their shape: either flat or like columns. Simple refers to a single layer of cells. 8. Which of the following is NOT an example of a cell? A. Macrophages B. Lysosomes C. Plasmocytes D. Chondroblasts Answer is B: The suffix “-some” refers to an organelle within a cell. The other suf- fixes all indicate a type of cell. 9. Which cell organelles contain an acidic environment capable of digesting a wide variety of molecules? A. Lysosomes B. Ribosomes C. Centrosomes D. Golgi complex Answer is A: The prefix “lyso -” refers to the ability to dissolve or destroy molecules or cells. 10. Which form of transport through the plasma membrane requires the expendi - ture of energy by the cell? 14 A. Facilitated diffusion B. Osmosis C. Active transport D. Diffusion Answer is C: The term “active” implies using energy (in the form of ATP) to move a molecule against its concentration gradient while the other processes are all passive. 11. Which of the tissue types below consists of a single layer of cells? A. Stratified squamous epithelial tissue B. Glandular epithelium C. Areolar connective tissue D. Simple columnar epithelial tissue Answer is D: The word “simple” indicates a single layer of cells. Stratified means several layers (or strata) of cells. 12. One of the following is NOT a serous membrane. Which one? A. Pleura B. Peritoneum C. Mucosa D. Pericardium Answer is C: Mucosa is a mucous membrane (and secretes mucus). 13. Which of the following is NOT made predominantly from epithelial tissue? A. In the dermis B. In exocrine glands C. In endocrine glands D. In the endothelium of blood vessels Answer is A: The dermis contains connective tissue, nervous tissue and muscle as well as epithelial tissue. 14. What are tendons and ligaments composed of? A. Dense connective tissue B. Liquid connective tissue C. Muscular tissue D. Epithelial tissue Answer is A: Tendons and ligaments are dense CT. This is strong as there is a high proportion of fibres. 15. What is the composition of the intercellular matrix in connective tissue? A. Cells and fibres B. Serous and mucous membranes and lamina propria C. Protein fibres and ground substance D. Interstitia l fluid Answer is C: “Intercellular” means between cells. So matrix is fibres and ground substance (but no cells). 16. Which statement about the plasma membrane is INCORRECT ? A. It is selectively permeable. B. It is composed of two layers of glycoprotein molecules. C. It contains receptors for specific signalling molecules. D. The plasma membranes of adjacent cells are held together by desmosomes. Answer is B: The PM is indeed made of two layers, but they are phospholipid (not glycoprotein) molecules. 17. Which of the follow ing is NOT epithelial tissue? A. The epidermis B. Glandular tissue C. The internal lining of blood vessels D. The dermis Answer is D: The dermis contains some of all four types of tissue. 18. Which of the following is NOT a cell found in connective tissue? A. Adipocytes B. Chon droblasts C. Keratinocytes D. Osteoblasts Answer is C: Keratinocytes are in the epidermis which is epithelial tissue. The other cell types occur in fat, cartilage and bone. 19. What tissue has cells that are closely packed and that have one surface attached to a bas ement membrane and the other free to a space? A. Epithelial tissue B. Muscle tissue C. Connective tissue D. Nervous tissue Answer is A: This is a definition of epithelial tissue. 20. What is the name of the mechanism that ensures that there is a higher concen - tration of sodium ions in the extracellular fluid than in the intracellular fluid? A. Facilitated diffusion B. The sodium -potassium pump C. Secondary active transport D. Osmosis Answer is B: The “pump” (or ATPase) transports Na+ out and K+ into the cell. 21. What are lysosomes, centrosomes and ribosomes example of? A. Stem cells B. Organelles within a cell C. Sensory receptors in the dermis D. Exocrine glands Answer is B: The suffix “-some” refers to small body or organelle within a cell.