Quiz 3: Digestive System and Metabolism

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What is the first process to occur in the digestive system?

Defecation

Ingestion (correct)

Peristalsis

Absorption

Which part of the digestive system operates voluntarily and is controlled by the cerebral cortex?

Pyloric sphincter

External anal sphincter (correct)

Ileocecal valve

Internal anal sphincter

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

Secretion

Mechanical digestion

Propulsion (correct)

Absorption

Which structure creates a brush border appearance upon microscopic examination?

Microvilli Signup and view all the answers

What is the main function of enzymes in the mouth?

Breakdown of carbohydrates Signup and view all the answers

What is the primary role of the small intestine in the digestive system?

Absorption of nutrients Signup and view all the answers

Which sphincter separates the stomach from the small intestine?

Pyloric sphincter Signup and view all the answers

What type of contractions propel the contents of the colon towards the distal large intestine?

Mass movements Signup and view all the answers

What is the primary function of bile in the digestion process?

Emulsification of lipids Signup and view all the answers

What is the result of damage to the enteric nervous system that innervates the digestive organs?

Disrupted motility Signup and view all the answers

What is the term for the process of removing waste from the body through the anus?

Defecation Signup and view all the answers

What is the name of the phase of stomach regulation triggered by the sensory stimuli of food, such as smelling or seeing it?

Gastric phase Signup and view all the answers

What is the requirement for the conversion of pepsinogen into the active form, pepsin?

acidic pH Signup and view all the answers

What is affected by damaged hepatocytes?

bile production Signup and view all the answers

What is the most potent stimulus for the release of bile by the liver?

bile salt re-entry into the liver Signup and view all the answers

What controls the passage of chyme from the stomach to the small intestine?

pyloric sphincter Signup and view all the answers

What is the primary function of bile in the digestive process?

fat emulsification Signup and view all the answers

What is the role of the vagus nerve in the digestive process?

stimulating the contraction of the stomach Signup and view all the answers