Unlike the cone cells in the eye, the rod cells are responsible for

Correct Answer: C

Rationale: Rod cells handle night vision (C), unlike cones (color, A). Depth perception (B) involves both, and eye color (D) is iris pigment.

Correct Answer: C

Rationale: Touch via skin (integumentary) sends signals to the nervous system (C). Heat (A) and nutrients (B) are indirect, and skin changes (D) are secondary.

Correct Answer: C

Rationale: Inflammation (C) is a secondary nonspecific defense. Tears (A), urine (B), and mucus (D) are primary barriers.

Correct Answer: D

Rationale: The adrenal glands (D) secrete epinephrine. Pituitary (A) releases ACTH, pineal (B) makes melatonin, and pancreas (C) produces insulin.

Correct Answer: A

Rationale: The diaphragm separates abdominal and thoracic cavities (A). Cranial-vertebral (B) are dorsal, vertebral-pericardial (C) is incorrect, and pelvic-abdominal (D) is below.