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An increase in peristalsis is associated with activation of which of the following nervous systems?

A.

Peripheral

B.

Central

C.

Parasympathetic

D.

Sympathetic

Answer and Explanation

The Correct Answer is C

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. 


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Related Questions

Correct Answer is D

Explanation

A. The stomach plays a key role in digestion by breaking down food mechanically and chemically but does not play a significant role in nutrient absorption.

B. The large intestine is primarily involved in water and electrolyte absorption, as well as the formation of feces. It does not significantly contribute to nutrient absorption.

C. While some digestion begins in the mouth, particularly with enzymes in saliva, nutrient absorption does not occur there.

D. The small intestine is the primary site of nutrient absorption in the digestive system. Its walls are lined with villi and microvilli that increase surface area for the absorption of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals.

Correct Answer is C

Explanation

A. Natural passive immunity occurs when antibodies are passed from mother to child, either during pregnancy or through breast milk. This is not related to having the disease.

B. Artificial passive immunity is the transfer of antibodies from an external source, such as through antibody-containing blood products, to provide immediate protection against a disease.

C. Natural active immunity is acquired when an individual is exposed to a pathogen and the immune system responds by producing antibodies and memory cells. This type of immunity occurs after contracting the disease.

D. Artificial active immunity is gained through vaccination, where a person is exposed to a harmless form of the pathogen (such as inactivated or attenuated form), prompting the immune system to create a defense without causing illness.

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