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Physiology - Gastrointestinal Tract Introduction

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Physiology - Gastrointestinal Tract Introduction

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Questions and Answers

Which of the following is NOT a major function of the gastrointestinal tract?

Excretion of waste (correct)

Digestion of food

Absorption of nutrients

Secretion of digestive enzymes

Which layer of the gastrointestinal tract wall contains the myenteric (Auerbach's) plexus?

Longitudinal muscle (correct)

Submucous (Meissner's) plexus

Circular muscle

Serosa

What is the primary function of the submucous (Meissner's) plexus in the gastrointestinal tract?

To control secretion

To supply blood vessels

To provide sensation (correct)

To control motility

Which of the following glands is NOT directly connected to the gastrointestinal tract?

Adrenal glands (C) Signup and view all the answers

What is the main function of the myenteric (Auerbach's) plexus in the gastrointestinal tract?

To control motility (B) Signup and view all the answers

Which of the following is NOT a major component of the nervous control of gastrointestinal tract functions?

Endocrine system (D) Signup and view all the answers

Which plexus in the enteric nervous system mainly controls gastrointestinal movement?

Myenteric plexus (D) Signup and view all the answers

What is the function of the submucous plexus in the enteric nervous system?

Regulates blood flow (B) Signup and view all the answers

Which type of receptor in the gastrointestinal mucosa is stimulated by the chemical nature of food?

Chemoreceptors (B) Signup and view all the answers

Which neurotransmitter is the usual chemical transmitter in the gastrointestinal enteric nervous system?

Acetylcholine (C) Signup and view all the answers

Which division of the autonomic nervous system innervates the distal part of the large intestine?

Parasympathetic sacral division (D) Signup and view all the answers

What is the effect of stimulating the sympathetic nervous system on gastrointestinal activity?

Inhibits motility and secretion (B) Signup and view all the answers