Gastrointestinal Physiology Quiz

What is the primary function of the muscularis mucosa in the gastrointestinal tract?

• Increase blood flow

• Absorb nutrients

• Change surface area for secretion or absorption

• Secrete digestive enzymes

Which nervous system primarily stimulates the functions of the gastrointestinal tract?

• Parasympathetic nervous system

• Sympathetic nervous system

• Central nervous system

• Somatic nervous system

What is the role of gastrin in the gastrointestinal system?

• Inhibits pancreatic enzyme secretion

• Inhibits gastric acid secretion

• Stimulates gastric acid secretion

• Stimulates bile production

Tags

NGSS.HS-LS1-3

Which hormone is primarily responsible for stimulating the gallbladder to contract?

• Secretin

• Gastrin

• Insulin

• Cholecystokinin (CCK)

What is the primary action of the myenteric plexus?

• Regulate blood flow

• Control secretion of hormones

• Inhibit gastric emptying

• Coordinate motility of the GI smooth muscle

Which of the following is a characteristic of bile salts?

• Hydrophobic only

• Amphipathic molecules

• Water-soluble only

• Inhibitory to lipid digestion

What is the primary site of absorption for vitamin B12?

• Colon

• Ileum

• Duodenum

• Stomach

Which of the following substances is secreted by the pancreas?

• Bile salts

• Gastrin

• Insulin

• Pepsinogen

What is the effect of secretin on pancreatic secretion?

• Stimulates enzyme secretion

• Stimulates HCO3- secretion

• Inhibits bile production

• Inhibits gastric acid secretion

Which type of muscle is primarily responsible for gastrointestinal motility?

• Striated muscle

• Unitary smooth muscle

• Skeletal muscle

• Cardiac muscle