The Digestive System

Question 1

Stages of Nutrition: Ingestion/ Eating

Answer 1

Food is taken into 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) and Stomach (Churning)

Question 7

Chemical Digestion

Answer 7

Involves the use of chemicals called enzymes to break down food.

Question 8

What are enzymes?

Answer 8

Enzymes are chemicals that speed up reactions with out 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

What is Bile?

Answer 11

It is made in the liver to break down fats

Question 12

Canines

Answer 12

One at either side of the incisors. 2 upper and 2 lower. Grasp and tear food.

Question 13

Pre-molar

Answer 13

3 at either side of the canine. 6 upper and 6 lower. Grind and Cush food.

Question 14

Molars

Answer 14

2 at either side of the pre-molars. 4 upper and 4 lower. Grind and crush food.

Question 15

Herbivore

Answer 15

Only eats plants. Very large incisors. Large molars and pre-molars to chew grass. (Example: sheep)

Question 16

Carnivore

Answer 16

Only eats meat. Large canine teeth. Use the teeth to catch and tear their prey. (Example: lion)

Question 17

Omnivore

Answer 17

Eats plants and meat. Need all the different teeth. (Example: humans)

Question 18

Incisors

Answer 18

At the front of the mouth. 4 upper 4 lower. Used for biting and cutting food.