What is the purpose of valves in the veins?

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Question 1 of 5

What is the purpose of valves in the veins?

Correct Answer: D

Rationale: Vein valves prevent reverse flow (D), aiding return to the heart. Not filtering (A), synchronizing (B), or separating (C).

Question 2 of 5

Which organ system is primarily responsible for regulating electrolytes?

Correct Answer: B

Rationale: The urinary system (B) regulates electrolytes via kidneys. Endocrine (A) influences, lymphatic (C) drains, and nervous (D) signals.

Question 3 of 5

The human egg cell, the oocyte, is contained within a protective/supportive structure while developing within the ovary called:

Correct Answer: C

Rationale: The oocyte develops in a follicle (C). Germatic vesicle (A) is a nucleus stage, acrosome (B) is sperm, and vestibule (D) is vaginal entry.

Question 4 of 5

The testicular artery is surrounded by a network of blood vessels called the:

Correct Answer: D

Rationale: The pampiniform plexus (D) surrounds the testicular artery, cooling blood. Seminal vesicles (A) secrete fluid, rete testis (B) is tubular, and testicular exchanger (C) is fictional.

Question 5 of 5

The penis contains a short bone called the coccyx that extends during erections.

Correct Answer: B

Rationale: False (B): The penis has no bone; the coccyx is in the spine. Erections are vascular. True (A) is incorrect.

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