ANP140: Digestive System

Receptive Relaxation

• The process by which the stomach contracts to mix food with digestive enzymes.

• The rapid emptying of stomach contents into the small intestine.

• Reflex of the stomach that prepares it to receive food

• The increase in acid secretion in response to food entering the stomach.

An increase in the number of action potentials increases the rate of contraction in the stomach

• False

• True

Produce HCl and Intrinsic Factor

• Mucous Cells

• Parietal Cells

• Chief Cells

• Enteroendocrine Cells (G cells)

What role does the liver play in digestion?

• It produces enzymes that break down proteins

• It absorbs nutrients from digested food

• It produces bile to help break down fats

• It cleans blood leaving the GI tract

• Store extra undigested food

Parietal cells are stimulated by which of the following to secrete HCl?

• PSNS

• CCK

• Histamine

• Gastrin

• Secretin

What is the function of enteroendocrine cells (G cells)?

• Secrete mucus to protect cells in the stomach from acid

• Secrete HCl and intrinsic factor

• Secrete gastric lipase and pepsinogen

• Release hormones (gastrin) and paracrine messengers (histamine)

Set by pacemaker activity in longitudinal smooth muscle

• Peristaltic waves

• Segmentation

• Receptive relaxation

• Propulsion

Secrete mucus to protect cells in the stomach from acid

• Enteroendocrine Cells (G cells)

• Chief Cells

• Mucous Cells

• Parietal Cells

Kills Bacteria, Denatures proteins, and activates pepsin and gastric lipase

• HCl

• Pepsin

• Intrinsic Factor

• Mucus

Secrete Gastric Lipase and Pepsinogen

• Mucous Cells

• Parietal Cells

• Chief Cells

• Enteroendocrine Cells (G cells)