A small child states that their stomach hurts but points to their umbilical region. Most likely the pain is originating from the:

Correct Answer: C

Rationale: The umbilical region centers on the small intestine, not liver (A, upper right), gallbladder (B, right), or stomach (D, upper left). A child's vague stomach' pain often reflects intestinal issues, common anatomically in this area.

Correct Answer: C

Rationale: Homeostasis involves sensors (detect), control centers (process), and effectors (act), not arteries (C, blood vessels). Arteries may be affected but aren't core components. Anatomy ties this to feedback loops e.g., thermoregulation excluding C.

Correct Answer: D

Rationale: PET (positron emission tomography) uses internal radioactive tracers, unlike X-rays, CT, or MRI, which use external sources. Anatomical imaging benefits from PET's metabolic insight, confirming D.

Correct Answer: D

Rationale: The abdominal cavity, is the largest hollow space, spanning diaphragm to pelvis, housing organs like stomach and liver. The cranial holds the brain, pelvic the bladder, thoracic the lungs, and spinal the cord all smaller. Anatomically, its expansive volume accommodates digestive and reproductive systems, justifying D over others.

Correct Answer: B

Rationale: The external environment, denotes variable external conditions temperature, humidity unlike internal environment (A, body fluids), homeostasis (C, stability), disease, or set points (E, targets). Anatomically, it contrasts with the regulated internal milieu, influencing adaptation (e.g., sweating), confirming B.