The proximal tubule
a. reabsorbs about 65% of the filtered water.
b. is the site of action for vasopressin
c. is the location where glucose is secreted
d. lies between the loop of Henle and the collecting ducts
e. none of these answers.
A
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During muscle contraction, a single myosin head consumes ATP at a rate of about ________ ATP per second.
A. 5 B. 9 C. 7 D. 3 E. 1
Which of the following statements concerning receptor potentials is correct? Receptor potentials
a. are usually depolarizations of receptors in response to adequate stimuli. b. are graded potentials. c. occur in neuronal cell bodies upon summation of pre synaptic input. d. both (a) and (b) above. e. all of these answers.
Typical renal blood flow is about ________ ml/min under resting conditions
A) 500 B) 800 C) 1200 D) 1800 E) 2500
Cells undergo division when which of the following conditions have been met?
A. They are still growing and have ample nutrients B. They have grown large enough and replicated their DNA C. They are stimulated by growth factors and neighboring cells are squeezed tightly against them D. They have grown large enough and neighboring cells are squeezed tightly against them