Mechanical, Chemical, Enzymes Digestion

Question 1

What is mechanical digestion?

Answer 1

Happens in the mouth
Teeth cut and grind food into small pieces (increases surface area)
Happens in stomach as it’s muscular wall churns food

Question 2

Where does mechanical digestion take place?

Answer 2

Mouth and stomach

Question 3

What is chemical digestion?

Answer 3

Starts in mouth
Continues to stomach and small intestine
Involves breaking chemical bonds in large molecules
Result in formation of smaller molecules
Enzymes are responsible for chemical digestion

Question 4

What is responsible for chemical digestion?

Answer 4

Enzymes

Question 5

Where does chemical digestion take place?

Answer 5

Starts in mouth, continues to stomach and small intestine

Question 6

What are enzymes? Why do we need them?

Answer 6

Every enzyme is specific (can carry out only one reaction)
We need different enzymes to digest different types of food molecule.

Question 7

What are the 3 main enzymes in our digestive system?

Answer 7

Amylase, Protease, lipase

Question 8

What are amylase enzymes?

Answer 8

Breaks down carbs eg starch into simple sugars

Question 9

What are protease enzymes?

Answer 9

Breaks down protein into amino acids

Question 10

What are lipase enzymes?

Answer 10

Breaks down fats into fatty acids + glycerol

Question 11

Name and Give in detail the Digestion Processes

Answer 11

Food passes from mouth to stomach by PERISTALSIS (relaxation and contraction of muscles)
Food is digested mechanically by teeth, tongue + stomach chemically by enzymes
Digested food absorbed into bloodstream in small intestine across villi? Villi increases surface area of small intestine, are thin + have good blood supply close to its surface to get rid of digested food.