Which of the following structures form the bulk of each of the testis?
vas deferens
Seminiferous tubules
Seminal vesicles
Corpus cavernosum
The Correct Answer is B
a. Vas deferens: This is a tube that transports sperm from the epididymis to the ejaculatory ducts but does not form the bulk of the testis.
b. Seminiferous tubules: These tubules are where sperm production (spermatogenesis) occurs and constitute the majority of the testicular mass.
c. Seminal vesicles: These are glands that produce seminal fluid and are not part of the testis.
d. Corpus cavernosum: This is erectile tissue found in the penis, not in the testis.
Nursing Test Bank
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Related Questions
Correct Answer is B
Explanation
a. Presence of calcium: Calcium does not directly stimulate the production of Vitamin D in the skin.
b. Exposure to ultraviolet light: UVB rays from sunlight stimulate the skin to produce Vitamin D3 (cholecalciferol).
c. Exposure to cold temperature: Cold temperature does not affect Vitamin D production.
d. Presence of parathyroid hormone: Parathyroid hormone helps regulate calcium levels and can stimulate the conversion of Vitamin D to its active form in the kidneys, but it does not stimulate its production in the skin.
Correct Answer is C
Explanation
a. Intercostal muscles: Intercostal muscles are located between the ribs and help with breathing movements. They don't separate the pleurae.
b. Pleural cavity: The pleural cavity is the space between the pleura and the lung on each side. There isn't another pleural cavity within this space.
c. Mediastinum: The pleura are two thin membranes that line the lungs and inner chest wall. The mediastinum is the central compartment of the thoracic cavity, containing essential structures like the heart, trachea, esophagus, and major blood vessels. It separates the right and left pleural cavities.
d. Diaphragm: The diaphragm is a dome-shaped muscle separating the thoracic cavity from the abdominal cavity. While it plays a role in respiration, it doesn't directly separate the pleurae
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