The Digestive System

Question 1

Digestion Pathway

Answer 1

Oral Cavity-> Pharynx-> Esophagus-> Stomach-> Small Intestine [Duodenum, Jejunem, Ileum]-> Large Intestine-> Rectum-> Anus

Question 2

Mechanical Digestion

Answer 2

The physical breakdown of large food particles into smaller food particles.

Ex. Chewing/Mastication

Question 3

Chemical Digestion

Answer 3

The enzymatic cleavage of chemical bonds.

Ex.

• cleavage of peptide bonds in proteins
• cleavage of glycosidic bonds in starches

Question 4

Intracellular Digestion

Answer 4

The oxidation of glucose and fatty acids to create energy.

Question 5

Extracellular Digestion

Answer 5

Occurs in the lumen of the alimentary canal.

Question 6

Four Accessory Organs of Digestion

Answer 6

Salivary glands, pancreas, liver, gallbladder

Question 7

Enteric Nervous System

Answer 7

Wall of the alimentary canal and controls peristalsis. Activity is up-regulated by the parasympathetic nervous system and down-regulated by the sympathetic nervous system.

Question 8

Question:

What two hormones trigger sensation of thirst and encourage behavior of fluid consumption?

Answer 8

ADH and Aldosterone; both secreted by anterior pituitary

Question 9

Question:

Which two hormones stimulate feelings of hunger?

Answer 9

Glucagon and Ghrelin; secreted by the pancreas and stomach

Question 10

Question:

Which two hormones stimulate the feelings of satiety?

Answer 10

Leptin and Cholecystokinin