Carbohydrate digestion begins in the____________ whereas protein digestion begins in the ___________.
liver; small intestine
mouth; stomach
small intestine; stomach
mouth; small intestine
The Correct Answer is B
A. Liver; small intestine: Carbohydrate and protein digestion do not begin in the liver or the small intestine. The liver is involved in metabolism but not in the initial digestion of carbohydrates or proteins.
B. Mouth; stomach: Carbohydrate digestion begins in the mouth with salivary amylase, while protein digestion begins in the stomach with pepsin.
C. Small intestine; stomach: Carbohydrate digestion begins in the mouth and not the small intestine. Protein digestion starts in the stomach, not the small intestine.
D. Mouth; small intestine: Carbohydrate digestion begins in the mouth, but protein digestion begins in the stomach, not the small intestine.
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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.
Correct Answer is C
Explanation
A. The renal tubules reabsorb more water. If blood volume and pressure are too high, the body would aim to reduce them, not increase them further. Reabsorbing more water would increase blood volume.
B. The kidneys produce less urine. To lower blood volume and pressure, the kidneys would increase urine production, not decrease it.
C. ADH release is inhibited: ADH (antidiuretic hormone) promotes water reabsorption in the kidneys, leading to increased blood volume and pressure. When blood volume and pressure are too high, the body inhibits ADH release to promote water excretion and lower blood volume and pressure.
D. The renal tubules reabsorb more sodium. Reabsorbing more sodium would lead to water retention, increasing blood volume and pressure, which is the opposite of what the body needs when blood volume and pressure are already high.