The sarcolemma
a. is the muscle cell plasma membrane
b. provide a means of rapidly transmitting the action potential from the surface into the central portions of the muscle fiber.
c. store ATP.
d. run longitudinally between the myofibrils.
e. have expanded lateral sacs.
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Question 2) The micturition reflex is initiated by stimulating ____________________ receptors in the bladder.
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Question 3) During excitation-contraction coupling,
a. the action potential travels down the transverse tubules.
b. Ca2+ is released from the sarcoplasmic reticulum.
c. Ca2+ is taken up by the sarcoplasmic reticulum.
d. both (a) and (b) above are correct.
e. all of these answers.
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Question 4) Body fluids are ____________________ at 300 mosm/liter.
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Question 5) During contraction, asynchronous cycling of crossbridges
a. prevents tetany.
b. prevents thick filaments from slipping backwards.
c. prevents thin filaments from slipping backwards.
d. utilizes less ATP.
e. none of these answers.
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Question 6) ____________________ is the inability to prevent the discharge of urine.
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Question 7) Which of the following changes in banding pattern occur during muscle contraction?
a. the A band gets shorter.
b. the I band gets shorter.
c. the H zone gets shorter.
d. both the I band and the H zone get shorter.
e. all of these answers.
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Question 8) ____________________ of the renal tissue can adequately perform all excretory and regulatory functions of the kidney.
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Question 9) The H zone
a. is the area within the middle of the A band where the thin filaments do not reach.
b. shortens or disappears during contraction.
c. contains only thick filaments.
d. both (a) and (b) above.
e. all of these answers.
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Question 10) ____________________ renal failure has a rapid onset but may be reversible; ____________________ renal failure is slow, progressive, and irreversible.
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