BIO201 Topic 9: Muscular System Histology and Physiology Quiz; 33.25 out of 35.00 (95%)Latest SEPT 2021

BIO201_MH_V3 Topic 9: Muscular System Histology and Physiology Grade 33.25 out of 35.00 (95%) Question 1 1.75 points out of 1.75 Which of the following is NOT a function of skeletal muscle? Select one: a. body movement b. maintenance of posture c. Dilating and constricting the pupil of the eye d. Carry out breathing movements e. production of heat Question 2 1.75 points out of 1.75 Which type of muscle tissue possesses striations? Select one: a. skeletal muscle b. smooth muscle c. cardiac muscle d. both skeletal and cardiac muscle e. both cardiac and smooth muscle Question 3 1.75 points out of 1.75 Which type of muscle tissue has spindle-shaped cells? Select one: a. skeletal muscle b. smooth muscle c. cardiac muscle d. both skeletal and cardiac muscle e. both cardiac and smooth muscle Question 4 1.75 points out of 1.75 Smooth muscle and cardiac muscle are similar in that they both Select one: a. are under involuntary control. b. are striated. c. are widely distributed in the body. d. have multiple nuclei. e. are under voluntary control. Question 5 1.75 points out of 1.75 Which type of muscle tissue has cells that branch? Select one: a. skeletal muscle b. smooth muscle c. cardiac muscle d. both skeletal and cardiac muscle e. both cardiac and smooth muscle Question 6 1.75 points out of 1.75 Identify the statement concerning skeletal muscle that is true. Select one: a. It comprises about 20% of the body's weight. b. It propels urine through the urinary tract. c. Its function is largely under involuntary control. d. It is a kind of connective tissue. e. It is responsible for locomotion. Question 7 1.75 points out of 1.75 Muscles exhibit the property of excitability. This means that the muscle Select one: a. shortens its length. b. recoils to its original resting length. c. stretches beyond its normal length. d. responds to stimulation by the nervous system. e. excites itself. Question 8 1.75 points out of 1.75 Why does muscle activity affect the temperature of the body? Select one: a. The rate of chemical reactions increases in muscle fibers during contraction, so the rate of heat production also increases. b. Muscle contraction generates pyrogens which reset the body's internal thermostat to a higher temperature. c. Muscle activity directs more warm blood to the muscles away from the central core causing a cooling effect on your internal organs. d. Increased muscle activity causes a rise in adipose stores which increases the insulation value of the body. Question 9 1.75 points out of 1.75 As muscle activity increases, the body temperature _____. Select one: a. decreases b. increase Question 10 1.75 points out of 1.75 The capacity of a muscle cell to shorten forcefully is known as Select one: a. contractility. b. excitability. c. extensibility. d. elasticity. e. flexibility. Question 11 1.75 points out of 1.75 The electrical properties of cells are the result of Select one: a. ion concentration differences across the plasma membrane. b. receptor sites that are present on the plasma membrane. c. phosphorylation reactions within the cytoplasm. d. phospholipids in the cell membrane. e. None of these choices is . Question 12 1.75 points out of 1.75 Troponin Select one: a. has two subunits. b. is part of the myosin myofilament. c. is a long, flexible protein. d. has a calcium-binding site. e. binds to ATP. Question 13 1.75 points out of 1.75 Which of the following events occurs during the lag phase of a muscle twitch? Select one: a. Muscle fibers shorten. b. Cross-bridges form, move, release, and reform many times. c. The action potential is propagated from presynaptic to postsynaptic membrane. d. Calcium is pumped back into the sarcoplasmic reticulum. e. All of these events occur in the lag phase. Question 14 1.75 points out of 1.75 Which of the following is NOT true of the latch state of smooth muscle contraction? Select one: a. Myosin phosphatase removes the phosphate group from myosin. b. It explains why smooth muscle can sustain tension for long periods of time. c. It occurs when the phosphate is removed while the cross-bridges are attached to actin. d. It occurs when the phosphate is removed while the cross-bridges are not attached to actin. e. It allows contraction without a large energy expenditure. Question 15 1.75 points out of 1.75 Arrange these structures as they participate in excitation-contraction. Select one: a. T tubules, sarcolemma, calcium ions, sarcoplasmic reticulum b. calcium ions, T tubules, sarcolemma, sarcoplasmic reticulum c. sarcolemma, T tubules, sarcoplasmic reticulum, calcium ions d. sarcoplasmic reticulum, calcium ions, T tubules, sarcolemma e. sarcolemma, sarcoplasmic reticulum, calcium ions, T tubules Question 16 1.75 points out of 1.75 When skeletal muscle is producing carbon dioxide and water while making ATP, which chemical processes could be active at this time? Select one: a. anaerobic respiration b. aerobic respiration c. both anaerobic and aerobic respiration Question 17 In 0.0 points out of 1.75 1.0 I don’t know why it was marked wrong Which of the following is NOT true of muscular atrophy? Select one: a. It is irreversible. This should be the answer b. It can be caused by disuse. c. It can be caused by denervation. d. Transcutaneous stimulation can help prevent it.e. Muscle fibers are replaced by connective tissue. Question 18 1.75 points out of 1.75 Heather is watching a movie. What type of chemical pathway do her muscles depend upon at this time? Select one: a. anaerobic respiration b. aerobic respiration c. both anaerobic and aerobic respiration Question 19 1.75 points out of 1.75 A lack of glycolytic enzymes within skeletal muscle cells would impair which type of ATPyielding process? Select one: a. anaerobic respiration b. aerobic respiration c. both anaerobic and aerobic respiration Question 20 1.75 points out of 1.75 Which of the following ly describes myoglobin's special function in muscle tissue? Select one: a. breaks down glycogen b. synthesizes ATP c. acts as a reservoir for oxygen d. produces action potentials e. stores glucose