human digestive system

Question 1

state the definition of digestion

Answer 1

the process by which the food we eat are hydrolysed into smaller more soluble molecules that can be absorbed by the body

Question 2

describe physical breakdown

Answer 2

large food particals are mechanically broken into smaller ones by the action of teeth then by the churning of food in the stomach

Question 3

describe chemical breakdown

Answer 3

larger insoluble molecules are broken down into smaller soluble ones by the action of enzymes

Question 4

state the definition of hydrolysis

Answer 4

breaking bonds with the addition of water

Question 5

describe the structure and function of the salivary glands

Answer 5

secrete saliva

a mixture of amylase water and ions to digest starch

Question 6

describe the structure and function of the pancreas

Answer 6

produces pancreatic juices

a mixture of enzymes in an alkaline solution for release unto the small intestine

Question 7

name the areas of the small intestine

Answer 7

• duodenum

- ilegum

Question 8

describe the structure of the small intestine

Answer 8

narrow muscular tube made up of different regions
main area of digestion and absorption of products
pancreatic juice and bile are released from food

Question 9

describe the structure and function of the stomach

Answer 9

a muscular bag can stretch to large quantities of food

the lining of the stomach secrets gastric juices

Question 10

what are the gastric juices the stomach

Answer 10

hydrochloric acid

a protease enzyme called pepsin