GIT Physiology: Digestive System Functions

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Questions and Answers

Which of the following is NOT a component of the digestive system?

  • Pancreas
  • Liver
  • Alimentary tract
  • Lungs (correct)

Which division of the autonomic nervous system increases gastrointestinal motility and secretion?

  • Sympathetic
  • Both divisions equally
  • Parasympathetic (correct)
  • Neither division

What is the primary function of the myenteric plexus?

  • Digest food
  • Control motility (contractions) (correct)
  • Control secretion and blood flow
  • Regulate hormone secretion

What stimulates the secretion of gastrin hormone?

<p>Both B and C (A)</p> Signup and view all the answers

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

<p>Respiration (B)</p> Signup and view all the answers

What is the main function of the Secretin hormone?

<p>Stimulates pancreatic secretion rich in bicarbonate (B)</p> Signup and view all the answers

What is the function of Cholecystokinin (CCK) hormone in the gastrointestinal system?

<p>Stimulates the contraction of the gallbladder (B)</p> Signup and view all the answers

Which salivary gland is responsible for the highest percentage of salivary secretion?

<p>Submandibular glands (C)</p> Signup and view all the answers

Which component of saliva is responsible for starting the digestion of starches?

<p>Amylase enzyme (B)</p> Signup and view all the answers

What stimulates the secretion of Secretin hormone in the duodenum?

<p>Increased acidity of the duodenum (A)</p> Signup and view all the answers

Flashcards

Digestive System

An organ system for digesting food.

Parasympathetic Nervous System

Controls gastrointestinal motility and secretion.

Myenteric Plexus Function

Controls gastrointestinal tract contractions (motility).

Gastrin Hormone Trigger

Stimulates stomach acid and enzyme release.

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Salivary Amylase Function

Breaks down starches (carbohydrates).

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Secretin Hormone Function

Adds bicarbonate to the lumen to neutralise the stomach acids.

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CCK Hormone Function

Stimulates gallbladder contraction and bile release.

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Submandibular Glands

Dominant contribution to saliva volume.

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Secretin Hormone Stimulus

Increase acidity of the duodenum.

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Non-function of GI tract

Respiration.

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