The Digestive System

Question 1

Stages of nutrition: Ingestion/Eating

Answer 1

Food is taken in by the body.

Question 2

stages of nutrition: Digestion

Answer 2

Food is broken down

Question 3

Stages of nutrition: Absorption

Answer 3

Digested food passes into the bloodstream

Question 4

Stages of nutrition: Assimilation

Answer 4

Using the food in the cells of the body

Question 5

Stages of nutrition: Elimination

Answer 5

Getting rid of undigested food

Question 6

Physical digestion

Answer 6

Mouth (teeth)

Stomach (churning)

Question 7

Chemical digestion

Answer 7

Involves the use of chemicals called enzymes to break down food

Question 8

Enzymes

Answer 8

Enzymes are chemicals that speed up reactions without being used up in the reaction.

Question 9

How do enzymes work?

Answer 9

Enzymes act on a substrate and breaks it down into a product e.g. : substrate = starch, enzyme = amylase (saliva), product = maltose (sugar)

Question 10

Most chemical digestion happens in…..

Answer 10

Small intestine

Question 11

Bile

Answer 11

Made in liver to break down fats

Question 12

Pancreas makes…….

Answer 12

Digestive juices which contain enzymes

Question 13

Canine

Answer 13

One at either side of the incisors

2 upper and 2 lower

Grasp and tear food.

Question 14

Pre-molar

Answer 14

3 at either side of the canine.

6 upper and 6 lower

Grind and crush food.

Question 15

Molars

Answer 15

2 at either side of the premolars.

4 upper and 4 lower.

Grind and crush food.

Question 16

Herbivore

Answer 16

Only eats plants

Very large incisors

Large molars and pre-molars to chew grass.

Example: sheep

Question 17

Carnivore

Answer 17

Only eats meat

Large canine teeth

Use the teeth to catch and tear their prey

Example: lions

Question 18

Incisors

Answer 18

At the front of the mouth

4 upper and 4 lower

Used for biting and cutting food

Question 19

Omnivore

Answer 19

Eats plants and meat

Need all of the different teeth

Example: humans