The light and dark bands of a sarcomere are generated by the overlap of:
a. actin and troponin
b. actin and tropomyosin
c. actin and myosin
d. myosin and troponin
e. myosin and tropomyosin
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Question 2) ACE inhibitor drugs block the action of _____________.
Fill in the blank(s) with correct word
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Question 3) Troponin
a. binds with calcium to prevent sarcomere shortening.
b. breaks down actin.
c. breaks down myosin.
d. forms the boundaries of a sarcomere.
e. is an enzyme in the sarcomere.
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Question 4) The plasma clearance of the harmless foreign compound ____________________ is equal to the GFR.
Fill in the blank(s) with correct word
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Question 5) The functional unit of skeletal muscle is the
a. lengthens when the muscle contracts
b. area between two Z lines.
c. consists of just actin and myosin
d. two of these answers.
e. all of these answers.
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Question 6) By reabsorption, substances leave the tubules of the nephrons and return to the blood in the ____________________.
Fill in the blank(s) with correct word
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Question 7) Which of the following characteristics are shared by all three types of muscle tissues?
a. each one contains myosin and actin.
b. each one is neurogenic.
c. each one is striated.
d. each one is considered to be under voluntary control.
e. none of these answers.
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Question 8) On the average, of the 125 ml/min of plasma filtered, ____________________ ml/min is reabsorbed, and ____________________ ml/min is excreted as urine.
Fill in the blank(s) with correct word
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Question 9) The region between two Z lines is a
a. muscle fiber.
b. myofibril.
c. myofilament.
d. sarcomere.
e. sarcoplasmic reticulum.
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Question 10) The fluid passing through the tip of the loop of Henle is ____________________ relative to normal body fluids.
Fill in the blank(s) with correct word
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