Question

10 mark for review a human kidney filters about 200 liters of blood each day. approximately two liters of liquid and nutrient waste are excreted as urine. the remaining fluid and dissolved substances are reabsorbed and continue to circulate throughout the body. antidiuretic hormone (adh) is secreted in response to reduced plasma volume. adh targets the collecting ducts in the kidney, stimulating the insertion of aquaporins into their plasma membranes and an increased reabsorption of water. if adh secretion is inhibited, which of the following would initially result? a the number of aquaporins would increase in response to the inhibition of adh. b the person would decrease oral water intake to compensate for the inhibition of adh. c blood filtration would increase to compensate for the lack of aquaporins. d the person would produce greater amounts of dilute urine.

Explanation:

ADH stimulates insertion of aquaporins for water re - absorption. Inhibiting ADH means less water re - absorption. So, more water will be excreted in urine, resulting in greater amounts of dilute urine.Options A is wrong as ADH stimulates aquaporin insertion, so inhibition won't increase aquaporins. Option B is incorrect as oral water intake is not an immediate response to ADH inhibition. Option C is wrong as blood filtration is not directly related to compensate for lack of aquaporins due to ADH inhibition.

Answer:

D. The person would produce greater amounts of dilute urine.