Body Bits Revision

Question 1

What is the function of Amylase?

Answer 1

Amylase is in the mouth in the saliva, it breaks down the carbohydrates into glucose.

Question 2

What is the function of protease and pepsin?

Answer 2

It is in the stomach where protease is produced to break down proteins to amino acids.

Question 3

What is Lipase function?

Answer 3

In the small intestine, lipase is produced to break down all the fats into fatty acids and glycerol.

Question 4

Which teeth type does biting, slicing and cutting?

Answer 4

Incisors

Question 5

Which teeth type does tearing and ripping?

Answer 5

Canines

Question 6

Which teeth type does chewing?

Answer 6

Premolars and Molars

Question 7

Whats the function of Incisors?

Answer 7

biting, slicing and cutting

Question 8

Whats the function of Canines

Answer 8

Tearing and ripping

Question 9

Whats the functions of Premolars and molars?

Answer 9

Chewing

Question 10

What type of teeth herbivores should use for grinding tough plant food?

Answer 10

Big flat molars, sharp incisors

Question 11

What type of teeth should carnivores have to tear and cut meat?

Answer 11

Large canines and sharp molars.

Question 12

What are enzymes?

Answer 12

It is a type of protein in a cell.

Question 13

Where can enzymes be found in the digestive system?

Answer 13

Your stomach, pancreas and small intestine. (Digestive enzymes)

Question 14

Order from mouth to anus in the digestive system.

Answer 14

Mouth
Salivary Glands
Oesophagus
Stomach
Gall bladder, Pancreas, Liver
Small intestine ( duodenum, ileum )
Large intestine
Rectum
Anus

Question 15

What is the function for the liver?

Answer 15

Produces bile to help break down lipids (fats).

Question 16

What is the function for the stomach?

Answer 16

To kill bacteria and enzymes to digest food.

Question 17

What is the function for the large intestine?

Answer 17

to absorb water from the waste food.

Question 18

What is the function for the small intestine?

Answer 18

to absorb the nutrients from the food to your bloodstream.

Question 19

What are the four chambers of the heart?

Answer 19

Left and right atrium
Left and right ventricles

Question 20

What is the circulatory system’s function?

Answer 20

To carry oxygen and nutrients to the cells around the body and carries the waste food and carbon dioxide in the veins.

Question 21

What is the function of the Aorta?

Answer 21

It carries deoxygenated blood to the rest of the body.

Question 22

What is the function of the Right Atrium?

Answer 22

To receive the deoxygenated blood from the body

Question 23

Define ‘Respiratory System’

Answer 23

Your respiratory system is the system of organs and tissues that help you breathe.

Question 24

Explain how gas exchange works.

Answer 24

During gas exchange, oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.

Question 25

What is the word equation for Respiration?

Answer 25

Food + Oxygen ---> Energy + Carbon Dioxide + Water

Question 26

Explain why the percentage of carbon dioxide exhaled air is higher than inhaled?

Answer 26

The percentage of Carbon dioxide is released during respiration therefore the % is higher in the exhaled air.

Question 27

What properties does the alveoli membrane surface need for gas exchange?

Answer 27

Thin, moist and a large surface area.

Question 28

Explain the function of the trachea.

Answer 28

To carry air in and out of your lungs

Question 29

Define respiration.

Answer 29

The exchange of oxygen and carbon dioxide.

Question 30

Where does mitosis occur in the body?

Answer 30

Everywhere in the body except se

Question 31

Where does meiosis occur in the body?

Answer 31

Ovaries for eggs, testicles for sperm.

Question 32

What are the amount of chromosomes produced in meiosis and mitosis?

Answer 32

halved for each cell, the same for each cell.

Question 33

Define 'Gene'

Answer 33

Its a part of DNA which is found in a small part of the chromosome.

Question 34

Define 'Allele'

Answer 34

It’s the different versions of each gene.

Question 35

Define 'DNA'

Answer 35

DNA is a long chained molecule made up of two strands forming a double helix.

Question 36

Define 'Chromosomes'

Answer 36

The strands of DNA inside.

Question 37

What is the number of daughter cells produced in Meiosis and Mitosis?

Answer 37

4 Cells 2 Cells

Question 38

What are the steps of DNA replication?

Answer 38

1. The DNA molecule unzips with a help of an enzyme 2. ANother enzyme uses the base pairing rule (A-T and C-G) to form new strands of DNA for each parent strand (old strand) 3. Two DNA Molecules are produced, each made up of one strand from the parent DNA molecule and the other strand is new.

Question 39

Why does DNA replicate?

Answer 39

So that the new cells that are produced after cell division contain the same genetic info as the parent cell.

Question 40

What would happen without DNA replication?

Answer 40

Then the new cells that are produced during the meiosis and mitosis would eventually not have the genetic info that was present in the parent cell.

Question 41

What are nucleotides, base, phosphate and sugar?

Answer 41

The building blocks for DNA

Question 42

What is the order as the blood pumps through the heart?

Answer 42

1) body 2) superior vena cava 3) right atrium 4) tricuspid valve 5) right ventricle 6) pulmonary arteries 7) lungs 8) pulmonary veins 9) left atrium 10) mitral or bicuspid valve 11) left ventricle 12) aortic valve

Question 43

What are the four heart valves?

Answer 43

Tricuspid valve Pulmonary valve Mitral valve Aortic valve