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Which of the following glands regulates the release of the hormone testosterone?

A.

Anterior pituitary

B.

Thyroid

C.

Parathyroid

D.

Posterior pituitary

Answer and Explanation

The Correct Answer is A

A.  Anterior pituitary:
The anterior pituitary gland regulates the release of testosterone by secreting luteinizing hormone (LH. , which stimulates the Leydig cells in the testes to produce testosterone. This hormonal regulation is crucial for maintaining testosterone levels and reproductive function, making this the correct answer.

B.  Thyroid:
The thyroid gland is involved in regulating metabolism and growth through hormones such as thyroxine (T4.  and triiodothyronine (T3. . It does not directly regulate testosterone production.

C.  Parathyroid:
The parathyroid glands are responsible for regulating calcium and phosphate balance in the body through the secretion of parathyroid hormone (PTH. . They do not play a role in regulating testosterone levels.

D.  Posterior pituitary:
The posterior pituitary gland releases hormones like antidiuretic hormone (ADH.  and oxytocin, but it does not regulate testosterone production. The regulation of testosterone primarily involves the anterior pituitary gland and its secretion of LH.


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Related Questions

Correct Answer is C

Explanation

A. Ileocecal sphincter:
The ileocecal sphincter controls the passage of digested material from the small intestine into the large intestine. While important for digestive transit, it does not regulate the release of chyme into the duodenum.

B. Lower esophageal sphincter:
The lower esophageal sphincter is located at the junction between the esophagus and the stomach. It prevents the backflow of stomach contents into the esophagus, but it is not involved in controlling the release of chyme into the duodenum.

C. Pyloric sphincter:
The pyloric sphincter is the valve that controls the release of chyme from the stomach into the duodenum, the first section of the small intestine. It regulates the flow of partially digested food, ensuring it enters the duodenum at an appropriate rate for further digestion and absorption, making it the correct answer.

D. Internal anal sphincter:
The internal anal sphincter is located at the end of the digestive tract and controls the release of feces from the rectum. This sphincter is involved in defecation rather than the release of chyme into the duodenum.

Correct Answer is B

Explanation

A. The outer tissue layer consisting of renal corpuscles and convoluted tubules:
This description refers to parts of the renal cortex rather than the renal pelvis. The renal corpuscles (glomeruli and Bowman's capsules. and convoluted tubules are part of the nephron located in the renal cortex, not the renal pelvis.

B. The cavity where urine flows from the calyces to enter the ureters:
The renal pelvis is a funnel-shaped cavity within the kidney where urine collects before flowing into the ureters. It serves as the conduit through which urine exits the kidney and enters the ureters, making this the correct description.

C. The expanded area of a renal tubule that encloses the glomerulus:
This describes the Bowman's capsule, which is a part of the nephron where filtration of blood occurs. It does not pertain to the renal pelvis.

D. The inner tissue layer consisting of the loop of Henle and collecting tubules:
This description pertains to the renal medulla, where the loop of Henle and collecting tubules are located. It does not describe the renal pelvis.

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