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Which of the following is a direct result of antidiuretic hormone?

A.

Increased urine acidity

B.

Increased urine volume

C.

Increased urine salinity

D.

Decreased urine volume

Answer and Explanation

The Correct Answer is D

A. Increased urine acidity: Antidiuretic hormone (ADH) primarily affects water reabsorption in the kidneys, not urine acidity. It does not have a direct effect on the acidity of the urine.

B. Increased urine volume: ADH works to conserve water by increasing water reabsorption in the kidneys, which decreases urine volume.

C. Increased urine salinity: While ADH does increase water reabsorption, which could concentrate the urine, its direct action is on water retention, not specifically on increasing urine salinity.

D. Decreased urine volume: ADH promotes water reabsorption in the kidneys, leading to decreased urine output. This is the direct and correct result of ADH action.


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Related Questions

Correct Answer is B

Explanation

A. During pubarche: Pubarche refers to the onset of puberty, but oogenesis (the formation of oocytes) begins much earlier, during embryonic development.

B. During embryonic development: Oogenesis begins during embryonic development when the female fetus's ovaries form and start producing primary oocytes. These oocytes remain in a suspended state until puberty.

C. During thelarche: Thelarche is the onset of breast development during puberty, but oogenesis starts long before this, during embryonic development.

D. At birth: While primary oocytes are present at birth, the process of oogenesis actually begins during embryonic development, not at birth.

Correct Answer is A

Explanation

A. Renal corpuscle: Blood plasma is filtered in the renal corpuscle, which includes the glomerulus and Bowman's capsule.

B. Renal capsule: The renal capsule is the outer protective layer of the kidney and does not filter blood plasma.

C. Renal tubule: The renal tubule is involved in reabsorption and secretion, not in the initial filtration of blood plasma.

D. Renal column: The renal column is a structural part of the kidney, not involved in filtering blood plasma.

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