What is the function of aldosterone?
It increases both Nat and K+ secretion.
It causes the urine to be more diluted.
It reduces Na* reabsorption and K+ secretion.
It increases Nat reabsorption and K+ secretion.
The Correct Answer is D
A. It increases both Na+ and K+ secretion: Aldosterone increases sodium (Na+) reabsorption and potassium (K+) secretion, but it does not increase the secretion of both ions.
B. It causes the urine to be more diluted. Aldosterone causes the urine to be more concentrated by increasing sodium reabsorption and potassium secretion.
C. It reduces Na+ reabsorption and K+ secretion. Aldosterone actually increases sodium reabsorption and potassium secretion, not reduces them.
D. It increases Na+ reabsorption and K+ secretion. Aldosterone promotes sodium reabsorption in the kidneys and increases potassium secretion, leading to more concentrated urine.
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Related Questions
Correct Answer is C
Explanation
A. Lactose; lactase: Lactase is the enzyme that breaks down lactose, not the other way around.
B. Lipases; micelles: Lipases break down lipids (fats) into fatty acids and glycerol, not micelles. Micelles are formed as part of the digestion process but are not the substrate for lipases.
C. Peptidases; proteins: Peptidases (or proteases) break down proteins into smaller peptides and amino acids. This is the correct answer.
D. Lactase; glucose: Lactase breaks down lactose into glucose and galactose, not just glucose.
Correct Answer is D
Explanation
A. Sperm; semen: Sperm is the male gamete, and semen is the fluid that contains sperm, but these are not analogous to the ovary, which is a gonad.
B. Testis; semen: The testis is the male gonad that produces sperm, but semen is the fluid that contains sperm. The analogous structure to the ovary is the testis, but this pairing with semen is not correct.
C. Semen; sperm: Semen is the fluid containing sperm, while sperm is the male gamete. Neither is a gonad, so this pairing is not analogous to the ovary.
D. Testis; sperm: The testis is the male gonad that produces sperm, making it analogous to the ovary, which is the female gonad that produces eggs.
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