What mechanisms are responsible for producing concentrated urine?

a. the juxtamedullary nephrons become active.
b. the counter-current mechanism pulls out much water.
c. vasopressin causes facultative water reabsorption in distal tubule.
d. both (a) and (b) above.
e. all of these answers.


E

Anatomy & Physiology

You might also like to view...

An example of a synovial joint would be the ________

A) Temporal B) Axis C) Brachial D) Knee

Anatomy & Physiology

List 4 examples of how goats are used

What will be an ideal response?

Anatomy & Physiology

Which of the following mechanisms produces the most ATP during cellular respiration?

A) oxidative phosphorylation B) substrate-level phosphorylation C) oxidation-reduction reactions D) oxidation reactions

Anatomy & Physiology

Answer the following statements true (T) or false (F)

1. The buffer system works because weak acids dissociate much less than do strong acids. 2. The end products of both aerobic and anaerobic catabolism of glucose can cause a drop in the blood pH. 3. Carbonic acid is a “fixed acid.” 4. Blood in the pulmonary artery has a higher pH than the blood in the pulmonary vein. 5. The kidneys can produce urine with a pH less than 5.

Anatomy & Physiology