14. Which one of the following factors WILL NOT affect the level of primary urin

Question

14. Which one of the following factors WILL NOT affect the level of primary urine production? a. Glomerular filtration rate b. Length of the loop of Henle c. Renal blood pressure d. Number of active nephrons 15. Which of the following holds true for urine of an individual with an abnormally high concentration of circulating ADH? (MCAT question) a. Hypertonic urine (compared to a normal individual) b. Hypotonic urine (compared to a normal individual) c. Isotonic urine (compared to a normal individual), because ADH will not affect urine concentration d. Isotonic urine (compared to a normal individual), however the specific ionic composition of the urine will be different

Explanation / Answer

14. B. length of the loop of Henle

Explanation:

If net renal blood pressure is more than 10mmHg then the glomerular filtrate rate will increase, so production of primary urine will increase. primary urine volume also increases if the number of active nephrons is more.

but in this case the length of the loop of Henle has no role, it only affects the concentration of urine.

15. A. hypertonic urine (compare to the normal individual)

ADH- Antidiuretic hormone its primary role is to retain water in the blood, to maintain water balance in body fluid.

If sufficient water is present in the blood then the Hypothalamus will not secrete ADH, if the body is dehydrated then hypothalamus releases to retain water in the blood, instead of losing it, so the concentration of urine takes place.

So if ADH is running in blood then urine will be concentrated, making it hypertonic.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.