The partial pressure of a gas is directly proportional to its molecular weight.

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Question 1 of 5

The partial pressure of a gas is directly proportional to its molecular weight.

Correct Answer: B

Rationale: False (B): Partial pressure depends on concentration and total pressure, not molecular weight (Dalton’s law). True (A) is incorrect.

Question 2 of 5

What is the primary hormone secreted by the thyroid?

Correct Answer: D

Rationale: The thyroid secretes T3 (triiodothyronine) and T4 (thyroxine) (D) as its primary hormones. Oxytocin (A) is from the pituitary, TSH (B) stimulates the thyroid, and adrenaline (C) is from the adrenal glands.

Question 3 of 5

Which is not produced by the pituitary gland?

Correct Answer: B

Rationale: TRH (thyrotropin-releasing hormone) (B) is produced by the hypothalamus, not the pituitary. FSH (A), LH (C), and ADH (D) are pituitary hormones.

Question 4 of 5

The hypothalamus is part of the

Correct Answer: B

Rationale: The hypothalamus is part of the endocrine system (B), regulating hormones. It’s not primarily cardiovascular (A), respiratory (C), or lymphatic (D).

Question 5 of 5

What is the function of parathyroid hormone?

Correct Answer: D

Rationale: Parathyroid hormone activates vitamin D (D) to regulate calcium. Energy (A) and metabolism (C) are thyroid-related, and cell reproduction (B) is not its role.

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