Women have a tendency to retain water during part of the menstrual cycle because estrogen mimics the action of what?
ADH
Natriuretic peptide
Oxytocin
Aldosterone
The Correct Answer is D
A. ADH (antidiuretic hormone) promotes water retention by increasing water reabsorption in the kidneys. Estrogen does not mimic the action of ADH.
B. Natriuretic peptide promote sodium excretion, which leads to water loss, not retention. Estrogen does not mimic this action.
C. Oxytocin is primarily involved in labor and lactation, not water retention. Estrogen does not mimic oxytocin's effects.
D. Aldosterone promotes sodium and water retention by increasing sodium reabsorption in the kidneys. Estrogen can mimic the action of aldosterone, leading to water retention during certain phases of the menstrual cycle.
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Correct Answer is A
Explanation
A. Small intestine; small intestine: Both amino acids and monosaccharides are absorbed in the small intestine, and fatty acids are also absorbed in the small intestine, where they are reassembled into triglycerides and incorporated into chylomicrons.
B. Small intestine; liver: Amino acids and monosaccharides are absorbed in the small intestine, but fatty acids are absorbed in the small intestine, not directly in the liver.
C. Stomach; small intestine: Amino acids and monosaccharides are absorbed in the small intestine, not the stomach, and fatty acids are absorbed in the small intestine, not the stomach.
D. Stomach; large intestine: Amino acids and monosaccharides are absorbed in the small intestine, and fatty acids are absorbed in the small intestine, not the stomach or large intestine.
Correct Answer is B
Explanation
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.