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Which accessory gland in the male reproductive system contributes 60% of the total semen volume?

A.

Prostate

B.

Ductus Deferens

C.

Seminal Vesicle

Answer and Explanation

The Correct Answer is C

A. Prostate: The prostate gland contributes to the semen volume but only about 20-30%. It produces a fluid that nourishes sperm and helps transport them but is not the primary contributor to the total volume of semen.

B. Ductus Deferens: The ductus deferens (vas deferens) is a tube that transports sperm from the epididymis to the ejaculatory duct. It does not produce or contribute to the volume of semen.

C. Seminal Vesicle: The seminal vesicles contribute approximately 60% of the total semen volume. They secrete a fluid that is rich in fructose and other substances that provide energy for sperm and help in the formation of semen.


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Related Questions

Correct Answer is D

Explanation

A. Hymen: The hymen is a thin membrane that partially covers the vaginal opening, but it does not separate the vagina from the uterus.

B. Fundus: The fundus is the upper part of the uterus, but it does not separate the vagina from the uterus.

C. Adventitia: This is the outer layer of the uterus, but it does not serve as a separator between the vagina and uterus.

D. Cervix: The cervix is the lower part of the uterus that protrudes into the vagina and acts as a barrier separating the two structures.

Correct Answer is C

Explanation

A. Aldosterone hormone: Aldosterone affects sodium and potassium reabsorption, increasing water retention indirectly, but it does not directly increase water permeability in the collecting ducts.

B. Atrial natriuretic peptide hormone: This hormone decreases blood volume by inhibiting sodium reabsorption, leading to more water excretion, not reabsorption.

C. Antidiuretic hormone (ADH): ADH increases the permeability of the collecting ducts to water, allowing more water to be reabsorbed into the bloodstream.

D. Parathyroid hormone: This hormone primarily regulates calcium levels, not water permeability.

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