Binding of ____ to myosin permits cross-bridge ____ between actin and myosin.
a. ATP, binding.
b. ATP, detachment.
c. calcium, binding.
d. calcium, detachment.
e. none of these answers.
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Question 2) Explain how both voluntary and involuntary responses are associated with micturition.
What will be an ideal response?
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Question 3) An action potential rapidly spreads to the central portions of a muscle cell by means of the
a. Z lines.
b. sarcoplasmic reticulum.
c. H zone.
d. pores in the membrane surface.
e. T tubules.
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Question 4) Use glucose and phosphate to contrast how the kidney does and does not regulate plasma concentration of plasma components.
What will be an ideal response?
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Question 5) This structure provide a means of rapidly transmitting the action potential to the central portions of the muscle fiber.
a. T-tubule
b. sarcoplasmic reticulum
c. Z lines
d. myofibril
e. myofilaments
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Question 6) Describe how the vertical osmotic gradient is used to create urine of various dilutions.
What will be an ideal response?
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Question 7) The T tubules
a. form the Z lines.
b. store Ca2+.
c. provide a means of rapidly transmitting the action potential to the central portions of the muscle fiber.
d. allow for nutrients to be carried into the cell.
e. none of these answers.
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Question 8) Describe the forces involved in glomerular filtration and explain how it is regulated by the sympathetic system.
What will be an ideal response?
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Question 9) Sequence the following events involved in muscle cell contraction
1 . Sodium channels open, allowing sodium to flow in
2 . Impulse reaches axon's synaptic knob
3 . ACh binds to receptors on sarcolemma
4 . Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis
5 . If enough sodium moves in to the muscle cell, an impulse (action potential) develops
a. 1, 2, 3, 4, 5
b. 2, 1, 3, 4, 5
c. 2, 4, 3, 1, 5
d. 3, 4, 5, 1, 2
e. 3, 5, 2, 1, 4
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Question 10) Bladder contractions are stimulated by ____________________ fibers that stimulate contractions by releasing ____________.
Fill in the blank(s) with correct word
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