Secretions

Question 1

Mucas/Saliva (contains mucas, water, and enzymes)

Answer 1

Source: mucosal cells of the GI tract, salivary glands
Function: -protects and lubricates the GI tracts
- moistens foods
- Helps form the bolus
-Facilitates taste
- Aids swallowing

Question 2

Enzymes

Answer 2

Source: Salivary glands, stomach, small intestine, and pancreas

Function: - Chemically reals down food via enzymes
- chemically breaks down food

Question 3

GI hormones (gastrin, secretin, cholecystokinin)

Answer 3

Source: Endocrine cells in the gastric pits, and endocrine cells in the mucosal lining of the small intestine

Function: Facilitate communication, and regulate GI motility and release of GI secretions

Question 4

Bile

Answer 4

Source: Made in the liver; stored and released from the gallbladder

Function: Enables lipid globules to disperse in water

Question 5

Pancreatic Juice (contains bicarbonate and enzymes)

Answer 5

Source: Pancreas

Function: Neutralizes chyme
- Provides enzymes needed for the chemical breakdown of carbohydrates, proteins, and lipids

Question 6

Gastric Juice (contains hydrochloric acid, enzymes, water, intrinsic factor)

Answer 6

Source: Exocrine cells of the gastric pits (mucus-secreting cells, parietal cells, and chief cells)

Function: -Provides enzymes needed for the chemical breakdown of some nutrients

• Hydrochloric acid is needed for forming chyme and activating some enzymes
• intrinsic factor is needed for absorption of vitamin D