Proximal convoluted tubules are responsible for reabsorbing all of the following except

A. potassium.
B. sodium chloride.
C. hydrogen ions.
D. urea.
E. water.


Ans: C. hydrogen ions.

Anatomy & Physiology

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Facial muscles are unusual in that they

A. are not involved in movement. B. insert and sometimes originate on skin and connective tissue. C. are not involved in facial expression. D. represent a combination of first-class and second-class lever systems. E. are smooth muscles rather than skeletal muscles.

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The peritubular capillaries are indicated by ________

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Cholecystokinine (CCK)

What will be an ideal response?

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Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?

A. Fast B. Intermediate C. Slow

Anatomy & Physiology