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Which of the following is not a "plumbing" structure of the urinary system?

A.

Urethra

B.

Ureters

C.

Glomeruli

D.

Urinary bladder

Answer and Explanation

The Correct Answer is C

A. Urethra: The urethra is a tube that carries urine from the bladder to outside the body—part of the “plumbing.”

B. Ureters: These are tubes that transport urine from the kidneys to the bladder.

C. Glomeruli: Glomeruli are part of the kidney’s filtration system, not the excretory “plumbing” system.

D. Urinary bladder: The bladder stores urine and is considered part of the urinary “plumbing.”


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Related Questions

Correct Answer is B

Explanation

A. Nothing, it's just a pass through to the next structure: The stomach plays a critical role in digestion through mixing and secretion of gastric juices.

B. Gastric juices mix with the food and the stomach muscles squeeze it: This process forms chyme through mechanical (squeezing) and chemical (acid/enzymes) digestion.

C. The food moves quickly into the small intestine: Food stays in the stomach for a period of time for processing before gradually passing into the small intestine.

D. The food is completely digested and is absorbed by tiny blood vessels in the walls of the stomach: Most digestion and nutrient absorption occur in the small intestine, not the stomach.

Correct Answer is B

Explanation

A. Aldosterone: Aldosterone is secreted by the adrenal glands, and it regulates sodium and water balance, not in response to low oxygen.

B. Erythropoietin: The kidneys secrete erythropoietin in response to hypoxia to stimulate the production of red blood cells in the bone marrow.

C. Converting enzyme: Refers to angiotensin-converting enzyme (ACE), which is found in the lungs and converts angiotensin I to II—not secreted by kidneys in response to hypoxia.

D. Renin: Renin is secreted by the kidneys in response to low blood pressure or sodium, not oxygen deficiency.

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