How does the integumentary system work with the nervous system?

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: 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.

Correct Answer: C

Rationale: Smooth muscle is in blood vessel walls (C). Heart (A) is cardiac muscle, head/neck (B) and torso/limbs (D) include skeletal.

Correct Answer: C

Rationale: The skull’s main parts are the cranium and mandible (C). Others (A, B, D) are specific bones, not divisions.