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 D
Explanation
A. Metabolic water; cutaneous transpiration: Metabolic water refers to the water produced during metabolic processes within the body. However, most body water intake comes from drinking fluids, not metabolic water.
B. Drinking; cutaneous transpiration and expired air: While drinking is indeed the main source of water intake, the greatest loss of water from the body is through urine, not cutaneous transpiration and expired air.
C. Drinking; radiation: While drinking is the primary source of water intake, radiation is not a significant way the body loses water.
D. Drinking; urine: Drinking fluids is the main source of water intake, and urine excretion is the primary way the body loses water.
Correct Answer is B
Explanation
A. the embryo; part of the placenta. The embryoblast (inner cell mass) will become the embryo, but the trophoblast will become part of the placenta, not the embryo.
B. part of the placenta; the embryo. The trophoblast forms part of the placenta and helps in its development, while the embryoblast (inner cell mass) will develop into the embryo.
C. part of the placenta; the yolk sac. While the trophoblast does contribute to the formation of the placenta, the embryoblast (inner cell mass) develops into the embryo, not the yolk sac. The yolk sac is derived from extraembryonic mesoderm and endoderm, not the inner cell mass directly.
D. the embryo; the yolk sac. The embryoblast (inner cell mass) develops into the embryo, but the trophoblast does not become the yolk sac. The yolk sac is formed from structures surrounding the embryo, not from the trophoblast itself.