Chap 3

Question 1

Name the 7 main classes of food

Answer 1

Carbohydrate
Protein
Fat
Vitamin
Mineral
Fibre
Water

Question 2

Vitamins can be classified in 2 categories, which are:

Answer 2

Water soluble vitamins, Fat soluble vitamins

Question 3

whats the meaning of water soluble vitamins

Answer 3

• they dissolve in the water in ur body
• easily lost through urine.
  -have to replenish more often

Question 4

whats the meaning of fat soluble vitamins

Answer 4

• they are absorbed and transported in a manner similar to that of fats

Question 5

What are water soluble vitamins

Answer 5

vitamin B and C

Question 6

What are some fat soluble vitamins

Answer 6

vitamin A, D, E and K

Question 7

Whats a mineral

Answer 7

a non organic substance required by the body

Question 8

6 examples of minerals

Answer 8

calcium, sodium, iron, iodine, phosphorus, potassium

Question 9

What does water act as

Answer 9

water act as a transportation medium of nutrients and oxygen into the cells

water also regulates body temperature through sweat

Question 10

what test do we use to test for presence of starch

Answer 10

iodine test

Question 11

what test do we use to test for glucose

Answer 11

benedict’s test

Question 12

what test do we use to test for protein?

Answer 12

Millon’s test

Question 13

what test do we use to test for fat

Answer 13

alcohol emulsion test

Question 14

what is food digestion

Answer 14

the process of breaking down food that is complex and large into molecules that are soluble to be absorbed by cells.

Question 15

Salivary amylase in the saliva breaks down starch into ?

Answer 15

maltose

Question 16

what is food that enters the oesophagus called?

Answer 16

bolus

Question 17

walls of stomach secrete:

Answer 17

protease and hydrochloric acid

Question 18

What is physical digestion?

Answer 18

• process of breaking down food into smaller particles
• involves peristalsis
• happens in mouth
• does not involve enzymes
• happen in digestive tract

Question 19

there are 2 different processes of digestion, these are:

Answer 19

Physical, Chemical

Question 20

What does hydrochloric acid do?

Answer 20

Activates the protease n kills bacteria in the food that enters the stomach

Question 20

what is chemical digestion

Answer 20

• process of breaking down food from complex molecules into simple molecules
• happens in mouth, stomach, duodenum and intestine
• involves enzymes
• happen in digestive tract

Question 21

What do you call food that is semi liquid

Answer 21

chyme

Question 22

what does the liver produce and where is it stored?

Answer 22

bile, stored in gall bladder

Question 23

what does the bile do?

Answer 23

emulsifies fat into small droplets and neutralises the acid in chyme

Question 24

the pancreas produces pancreatic juice which contain enzymes:

Answer 24

amylase, protease and lipase

Question 25

Pancreatic amylase digests ______ into _________?

Answer 25

starch into maltose

Question 26

Protease digests ______ into ________?

Answer 26

polypeptides into dipeptides

Question 27

Lipase digests ______ into _______ and _____?

Answer 27

fat into fatty acids and glycerol

Question 28

the small intestine secretes enzymes maltase which digests ________ into ____ and enzymes protease which digests ________ into ___________?

Answer 28

digests maltose into glucose, digests dipeptides into amino acids

Question 29

what process happens in the large intestine

Answer 29

water reabsorption

Question 30

food that is undigested, known as faeces is stored in here.

Answer 30

rectum

Question 31

what would happen if there are no enzymes?

Answer 31

digestion process happens at a very slow rate

Question 32

name three digestive enzymes and state their functions

Answer 32

Amylase which is used to digest starch into maltose, Protease which digests polypeptides into dipeptides Lipase which digests fat into fatty acids n glycerol

Question 33

Whats the function of the many folds on the surface of the small intestine

Answer 33

to add to the surface area n increase the absorption rate

Question 34

what is the function of the blood vessels in the small intestine

Answer 34

transport nutrients to all parts of the body

Question 35

what is assimilation

Answer 35

process of distributing the end products of digestion for the use of the cells in our body

Question 36

What does the blood circulatory system do

Answer 36

transports small and simple molecules to the cells of the body

Question 37

end products of assimilation are distributed for:

Answer 37

formation of new cells, respiration and regulation of body temperature