The term used to describe the stomach's expansion to accommodate volume without any rise in intraluminal pressure is referred to as:

Correct Answer: D

Rationale: Receptive relaxation allows the stomach to expand as food enters, mediated by the vagus nerve, without increasing pressure.

Correct Answer: B

Rationale: The esophagus is the muscular tube that transports food from the mouth to the stomach. The trachea is for air, the duodenum is part of the small intestine, and 'food tube' is not a scientific term.

Correct Answer: B

Rationale: Villi are finger-like projections in the small intestine that increase surface area for absorption.

Correct Answer: C

Rationale: Hyperthermic refers to an abnormally high body temperature.

Correct Answer: B

Rationale: Nephrons drain into collecting ducts, which lead to the ureter.