biology

Question 1

what happens when we breathe?

Answer 1

gas exchange.

Question 2

where does gas exchange take place?

Answer 2

the lungs- the aveoli

Question 3

what protects your lungs?

Answer 3

your ribs

Question 4

what is the respiratory system also known as?

Answer 4

the gas exchange system

Question 5

after air enters your body where does it go?

Answer 5

it moves down the trachea

Question 6

once the air has left the trachea. what tiny tube does it move through?

Answer 6

bronchiole

Question 7

once air leaves the bronchiole where does it go?

Answer 7

alveolus

Question 8

once air leaves the alveolus does it diffuse into your heart or your blood?

Answer 8

it diffuses into your blood

Question 9

name 4 ways alveoli has evolved to diffuse blood more efficiently.

Answer 9

1.It is moist
2.Large surface area.
3.Thin walls
4.Rich supply of capillaries

Question 10

what happens to the diaphragm when you inhale and exhale?

Answer 10

inhaling = contracts downwards
exhaling= relaxes up

Question 11

does chest volume increase as you inhale

Answer 11

yes

Question 12

true or false. the rib cage moves up and out when you exhale and down and in when you inhale.

Answer 12

false

Question 13

what can nicotine increase your risk of?

Answer 13

cancer, lung and heart disease

Question 14

what does alchol affect

Answer 14

your nervous system and liver

Question 15

are sweating headaches and nausea withdraw symptoms

Answer 15

yes

Question 16

what is the recommended amount of units of alcohol per week?

Answer 16

14 units