7. digestive system

Question 1

chemical digestion is in the :

Answer 1

mouth, stomach and SI

Question 2

mechanical digestion is in the

Answer 2

mouth and SI

Question 3

bicarbonate is secreted and produced where. what does it do?

Answer 3

pancreas to the SI- alkalinizes the chyme

Question 4

structures that increase absorption

Answer 4

microvilli, villi, circular folds

Question 5

what does the pyloric valve do?

Answer 5

controls food movement preventing the SI from ebeing overwhelmed

Question 6

3 subdivisions of the SI

Answer 6

duodenum, jejunum, ileum

Question 7

3 layers of muscles help the stomach act as a bread maker to churn the food around, producing:

Answer 7

chyme. Chyme empties into the small intestine through the pyloric sphincter

Question 8

the sight, smell, and taste of food stimulate what nervous system

Answer 8

PNS- which increase the secretion of gastric juice ny stomach glands

Question 9

intrinsic factor

Answer 9

produced by the stomach. It is needed for the absorption of B12 in the SI.

Question 10

what does saliva do

Answer 10

1. moisten and bind food in bolus 2. enzymes 3. lysozyme and antibodies that inhibit bacteria 4. dissolves food chemicals so they can be tasted on the chemoreceptors

Question 11

accessory digestive system organs:

Answer 11

pancreas, liver, gallbladder

Question 12

the organs of the alimentary canal are:

Answer 12

mouth, pharynx, esophagus, stomach, SI, LI, anus

Question 13

the 2 main organ groups of the digestive system

Answer 13

1. alimentary canal( GI tract) 2. the accessory digestive organs