5) When filtrate enters the collecting duct it is hypertonic to the surrounding

Question

5) When filtrate enters the collecting duct it is hypertonic to the surrounding fluid. A) True B) False 6) Several hormones are synthesized in the hypothalamus and transported to the anterior pituitary gland. The mechanism of transportation from hypothalamus to anterior pituitary gland is through the A) hypophyseal portal system B) general circulatory system C) hypothalamic-hypophyseal tract D) hepatic portal system 7) Increased blood glucose causes increased insulin secretion from the pancreas. This is an example of A) hormonal regulation of hormone secretion. B) neural regulation of hormone secretion. C) humoral regulation of hormone secretion.

Explanation / Answer

5. When filtrate enters the collecting duct it is hypotonic to the sorrounding fluid and the antidiuretic hormone increases permeability of of collecting tubule for reabsorption of water.

Hence the statement is (false).

6. The mechanism of transportation from hypothalamus to anterior pituitory gland is through hypophyseal portal system.

Hence option (A) is correct.

12. Body temperature higher than the normal is called fever. It is caused by infection in the body and is very dangerous.

Hence option (A) is correct.

13. Permissiveness, antagonism and synergism are hormone interactions. In permissiveness one hormone is necessary for the proper functioning of other hormone.

In synergism two hormones together increase their effect and in antagonism one hormone inhibits function of other hormone.

Feedback is not hormone interaction but it is hormone regulation.

Hence option (A) is correct..

14. Excretion of dilute urine requires impermeability of collecting tubule to water so that it is not reabsorbed and urine doesn't become hypertonic.

Hence option (D) is correct.

15. Adaptive immunity is activatated by antigens like pathogens which activates antibodies.

Hence option (A) is correct.

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