1) An increase in the permeability of the cells of the collecting tubule to wate
ID: 3510174 • Letter: 1
Question
1) An increase in the permeability of the cells of the collecting tubule to water is due to a(n) A) decrease in the production of ADH B) increase in the production of ADH C) increase in the production of aldosterone D) decrease in the concentration of the blood plasma . 2) A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once. The best explanation of this is the flu has several strains that change seasonally. A. True B. False 3) Which of the following is NOT a parathyroid gland mechanism to maintain adequate levels of blood calcium? A) increased intestinal absorption of calcium ions B) increased calcium ion reabsorption by the kidneys C) inhibition of calcitonin synthesis D) activation of osteoclasts 4) During an afternoon class, Lisa starts to feel hungry and worries that her blood sugar level may be dropping. Which hormone is helping to prevent a drop in blood sugar level? A) aldosterone B) glucagon C) insulin D) thyroxine 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
1.Answer will be c.) Increase in production of Aldosterone. Aldosterone acts on Na/K exchanger on collecting tubules. It makes collecting tubules permeable to water and thus helps in water reabsorption and water retention.
2.True. Explanation is best explained. Flu has several strain that change seasonally. Polio has also three strain but they don't change seasonally.
3.Answer will be b.)increase calcium ion reabsorption by the kidneys. Parathyroid hormone has no effect on calcium reabsorption by kidneys. It increase blood calcium level by other means given in option a,c and d.
4.Answer will be b.)Glucagon.it increases blood sugar level by gluconeogenesis.
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