Urethra is characterized by

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Question 1 of 5

Urethra is characterized by:

A. A hollow muscular sac. B. Mucous membrane lined tube that leads from the bladder to the exterior. C. Muscular lined tubes. D. Stone formation in the kidney.

Correct Answer: B

Rationale: Urethra is the tube carrying urine from bladder to outside the body.

Question 2 of 5

What effect is achieved by having an arteriole that supplies blood and another that drains blood from the glomerulus?

A. oxygen rich blood can be supplied to the nephron after blood leaves the glomerulus B. the blood pressure within the glomerulus can be manipulated. C. reabsorption of water and nutrients from the filtrate is facilitated. D. the concentration gradient within the kidney's medulla can be maintained.

Correct Answer: B

Rationale: Arterioles adjust glomerular pressure for filtration control.

Question 3 of 5

Which statement about kidney anatomy is correct? Renal pyramids are in the:

A. medulla and end in a papilla that empties into a minor calyx B. medulla and end in a column that empties into a major calyx C. cortex and end in a papilla that empties into a minor calyx D. cortex and end in a column that empties into a minor calyx

Correct Answer: A

Rationale: Pyramids in medulla end at papillae into minor calyces.

Question 4 of 5

What is the role of aldosterone?

A. to convert angiotensinogen into angiotensin I. B. to inhibit the absorption of Na+. C. to promote the absorption of Na+. D. to promote the absorption of Ca++.

Correct Answer: C

Rationale: Aldosterone enhances sodium reabsorption from filtrate.

Question 5 of 5

What is renin?

A. an enzyme released by the juxtaglomerular cells of the kidney when arterial pressure falls. B. it catalyses the formation of angiotensin II in the lungs. C. it is a rapid acting, intense vasoconstrictor of arterioles. D. a protein that stimulates the adrenal glands to release aldosterone.

Correct Answer: A

Rationale: Renin is released by JG cells to raise blood pressure.

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Urethra is characterized by:

Nurselytic

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