The serous membrane covering the heart is the

Correct Answer: D

Rationale: The visceral pericardium covers the heart's surface, unlike parietal pleura (A, lungs), parietal pericardium (B, heart sac), or visceral peritoneum (C, abdominal organs). Visceral layers adhere to organs, a precise anatomical distinction.

Correct Answer: D

Rationale: The endocrine system (e.g., thyroid) secretes hormones, unlike integumentary (A, skin), cardiovascular (B, circulation), or digestive (C, food). Anatomy ties glands to regulation e.g., insulin from pancreas making D correct.

Correct Answer: B

Rationale: Positive feedback amplifies change (e.g., childbirth contractions), unlike homeostasis (A, stability), negative feedback (C, reversal), or homeothermic (D, temperature). Anatomy highlights this in rare escalating processes, confirming B.

Correct Answer: B

Rationale: The sagittal plane divides the body into left and right portions, as per the document (answer B). This vertical plane runs longitudinally, with the midsagittal plane splitting symmetrically. Unlike transverse (A, C, horizontal), coronal (D, front-back), or cavity-specific divisions, sagittal is key in anatomy for lateral symmetry analysis e.g., comparing left and right brain hemispheres. Its precision aids in imaging and surgical planning, distinguishing it from other planes.

Correct Answer: D

Rationale: The stomach, initiates food breakdown via mechanical churning and secretes gastric juice (acid, enzymes) that kills bacteria. The liver produces bile, heart pumps blood, colon absorbs water, and skin protects. Anatomically, the stomach's acidic environment (pH A.5-C.5) digests and sterilizes, aligning with digestion's start, confirming D.