1. Which of the following statements about aldosterone isNOT correct?

Aldosterone is stimulated by decreased plasma sodium levels andincreased plasma potassium levels.

Aldosterone increases the number of passive sodium channels inthe luminal membrane of the distal tubule and collecting duct, thusaiding sodium reabsorption.

Aldosterone increases sodium reabsorption by increasing thenumber of Na⁺-K⁺ ATPase pumps in theluminal membrane of the proximal tubule.

Aldosterone is produced in the adrenal cortex.

2. Which of the following statements about ADH(antidiuretic hormone) is correct?

ADH is released by the posterior pituitary gland.

ADH inserts water channels into the luminal membrane of theproximal tubules.

ADH is synthesized by the adrenal gland and works in thekidney.

ADH would increase urine volume.

3. In severe dehydration or blood loss, what would be thelevels of ADH and what would be the urine flow rate?

ADH – high; high urine flow rate (16 ml/min)

ADH – low; low urine flow rate (0.25 ml/min)

ADH – high; low urine flow rate (0.25 ml/min)

ADH – low; high urine flow rate (16 ml/min)