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Digestive System Overview

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Questions and Answers

What is the function of mucus in the digestive tract?

To break down large food molecules into smaller molecules

To lubricate the food and protect the lining of the digestive tract (correct)

To stimulate smooth muscle contraction and glandular secretion

To aid in the movement of food through the digestive tract

What is the primary function of liver secretions in the digestive process?

To break large lipids into smaller droplets for digestion and absorption (correct)

To stimulate smooth muscle contraction and glandular secretion

To aid in the movement of food through the digestive tract

To secrete enzymes for the breakdown of large food molecules

Which type of digestion involves the mastication and mixing of food?

Mechanical digestion (correct)

Peristaltic digestion

Chemical digestion

Segmental digestion

What is the function of enteric sensory neurons in the digestive system?

Detect changes in the chemical composition of digestive tract contents or mechanical changes (B) Signup and view all the answers

Which neurotransmitter stimulates digestive tract motility and secretions?

Acetylcholine (B) Signup and view all the answers

What do hormones such as gastrin and secretin help regulate in the digestive tract?

Digestive enzymes secretion (C) Signup and view all the answers

What is the main function of histamine in the digestive system?

Control local reflexes within the ENS (B) Signup and view all the answers

Which major neurotransmitter inhibits digestive tract motility and secretions?

Norepinephrine (A) Signup and view all the answers

What is Hirschprung disease or megacolon caused by?

Absence of enteric neurons in the distal large intestine (D) Signup and view all the answers

Which process primarily occurs in the large intestine?

Elimination (B) Signup and view all the answers

What is the term used to refer to the movement of food from one end of the digestive tract to the other?

Propulsion (B) Signup and view all the answers

Which term is used to describe the intake of solid or liquid food into the stomach?

Ingestion (D) Signup and view all the answers

What is the technical term for the digestive tract extending from the mouth to the anus?

Alimentary canal (D) Signup and view all the answers

Which organ is primarily responsible for secreting fluids into the digestive tract?

Salivary glands (C) Signup and view all the answers

What is the collective term for the oral cavity, pharynx, esophagus, stomach, small intestine, and large intestine?

Gastrointestinal tract (A) Signup and view all the answers

How long does it take for food to travel the entire length of the digestive tract?

24-36 hours (A) Signup and view all the answers