Which of the following heart valves separates the right atrium from the right ventricle?

A. A vesicle is involved in the transport of substances within or out of the cell via processes like endocytosis or exocytosis but does not directly permit ion passage across the membrane.
B. An enzyme catalyzes chemical reactions and is not directly involved in the transport of ions across the cell membrane.
C. A channel protein facilitates the passage of ions across the cell membrane, allowing specific ions to move in and out of the cell based on concentration gradients.
D. A lysosome is an organelle responsible for digesting and breaking down waste materials within the cell, not for ion transport across the membrane.

A. The peripheral nervous system is responsible for transmitting signals between the central nervous system and the rest of the body, but it does not directly govern the increase in peristalsis.

B. The central nervous system (CNS) processes information and coordinates responses but does not directly control the movement of the digestive system. The autonomic nervous system, which includes the parasympathetic and sympathetic divisions, controls peristalsis.

C. The parasympathetic nervous system is responsible for "rest-and-digest" activities. It stimulates peristalsis to promote digestion and the movement of food through the gastrointestinal tract, leading to an increase in peristalsis.

D. The sympathetic nervous system is involved in the "fight-or-flight" response, which inhibits digestive processes, including peristalsis, as the body prioritizes other functions.