During which phase of mitosis do chromosomes condense, and the nuclear envelope begins to break down?

Correct Answer: A

Rationale: Prophase involves chromosome condensation and nuclear envelope breakdown.

Correct Answer: B

Rationale: Platelets aggregate at injury sites, adhering to collagen to form plugs, and release clotting factors and vasoconstrictors like serotonin.

Correct Answer: C

Rationale: Insulin increases glucose uptake by facilitating transporter movement to the muscle cell membrane.

Correct Answer: A

Rationale: Thirst is triggered by increased plasma tonicity (osmoreceptors in hypothalamus); low volume also stimulates it, and ADH increases.

Correct Answer: A

Rationale: Respiratory acidosis is defined by high PCO2; kidneys compensate by raising HCO3-.