The only movable joint of the skull is

Correct Answer: C

Rationale: The temporomandibular joint (TMJ) is the skull's only movable joint, enabling jaw motion. 'Temporo mandibular joint,' is correct, per anatomy (e.g., Gray's). 'Zygomatic arch,' is a structure, not a joint. 'Condyloid joint,' is a type, not specific. 'Occipito-sphenoidal joint,' is a suture, immobile. TMJ's mobility makes C the accurate answer.

Correct Answer: B

Rationale: Menopause marks the permanent end of menstruation due to ovarian follicle depletion, typically around age 50. 'Menopause,' is correct, per gynecological texts like Williams Gynecology. 'Menarche,' is menstruation's onset. 'Menstruation,' is the cyclic process itself. 'Metrorrhagia,' is irregular bleeding. Menopause's distinct cessation, linked to hormonal decline, distinguishes B as the precise answer, a natural reproductive transition.

Correct Answer: B

Rationale: Under anaerobic conditions, carbohydrate metabolism (glycolysis) produces lactic acid in humans when oxygen is scarce. 'Lactic acid,' is correct, per biochemistry texts like Voet, accumulating in muscles during intense exercise. 'Carbon dioxide,' and 'Water,' are aerobic respiration products. 'Acetyl CoA,' feeds the Krebs cycle aerobically. Lactic acid's formation in anaerobic glycolysis distinguishes B as the accurate answer.

Correct Answer: C

Rationale: The liver detoxifies, produces bile, and synthesizes proteins, but insulin secretion is pancreatic. 'Insulin secretion,' is correct as the exception, per physiology (e.g., Vander). 'Detoxification,' neutralizes toxins. 'Bile production,' aids digestion. 'Protein synthesis,' includes albumin. Insulin's endocrine pancreatic origin distinguishes C as the accurate answer.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.