Chapter 11

Question 1

name the 7 things our cells need energy for?

Answer 1

1.contracing muscles
2.making protein moelcules
3.cell division
4. active transport
5.growth
6.transmitting nerve impulses
7.producing heat inside the body

Question 2

What is the main nutrient that gives us energy?

Answer 2

glucose

Question 3

What is a aerobic respiration?

Answer 3

chemical reactions that takes place in the mitochondria

Question 4

What is the equation for aerobic respiration?

Answer 4

glucose + oxygen» carbon dioxide + water

Question 5

What is a anaerobic respiration?

Answer 5

chemical reactions that releases energy without using oxygen

Question 6

how does aerobic respiration work?

Answer 6

release energy from glucose by combing it with oxygen

Question 7

what is yeast?

Answer 7

a single celled fungus that respires anaerobically(breaks down glucose to alcohol

Question 8

What is the anaerobic respiration equation for yeast?

Answer 8

glucose» alcohol + carbon dioxide

Question 9

What is the anaerobic respiration equation for the body?

Answer 9

glucose»lactic acid

Question 10

what is gas exchange?

Answer 10

the diffusion of oxygen & carbon dioxide into & out of the body

Question 11

What are a gas exchange surface?

Answer 11

part of the body where gas exchange between the body & envirment take place

Question 12

name 4 ways that could help the process of gas exchange be quick & effient?

Answer 12

1.good supply of oxygen
2.large surface area
3.close to an effient transport system
4.they are thin

Question 13

What is a alveoli?

Answer 13

tiny air-filled sacs in the lungs where gas exchange happens

Question 14

Where does the oxygen diffuse into the blood?

Answer 14

in the alveoli

Question 15

What is a trachea?

Answer 15

the tube through which air travels to the lungs

Question 16

What is a thorax?

Answer 16

the chest,(the part of the body from the neck down to the diaphram)

Question 17

What is a bronchus?

Answer 17

1 of 2 tubes that takes air from the trachea into the lungs

Question 18

what is a bronchiole?

Answer 18

a small tube that takes air from a bronchus to every part of the lungs

Question 19

What are the 4 features the walls of alveoli has to make them an effient gas exchange surface?

Answer 19

1.they are very thin
2.excellent transport system
3.large surface area
4.good oxygen supply

Question 20

what is ventilation?

Answer 20

the movement in & out of the lungs

Question 21

how much % of oxygen is in inspired air?

Answer 21

21%

Question 22

How much % of carbon dioxide is in inspired air?

Answer 22

0.04%

Question 23

How much % of water vapour is in inspired air?

Answer 23

variable

Question 24

How much % of oxygen is in expired air?

Answer 24

16%

Question 25

How much % of carbon dioxide is in expired air?

Answer 25

4%

Question 26

How much of water vapour is in expired air?

Answer 26

very high