Respiration And Breathing

Question 1

What is the word equation for respiration and breathing

Answer 1

Glucose+oxygen– carbon dioxide+water+energy

Question 2

What does aerobic respiration require

Answer 2

The presence of oxygen

Question 3

How do humans breathe

Answer 3

By exchanging oxygen for carbon dioxide in the lungs

Question 4

How do fish breathe

Answer 4

By extracting oxygen from water in their gills

Question 5

What is the definition of breathing

Answer 5

The process by which animals bring air or water into contact with their gaseous exchange surface.

Question 6

Nose

Answer 6

Moistens, cleans and tests the air taken in

Question 7

Epiglottis

Answer 7

Stops food from going down the lungs

Question 8

Trachea (windpipe)

Answer 8

Tube by which air is moved into and out of the lungs

Question 9

Rings of cartilage

Answer 9

Keep the trachea permanently open

Question 10

Bronchus

Answer 10

Carries air from the trachea to and from the lungs

Question 11

Bronchiole

Answer 11

Narrow tubes through which gases diffuse to and from the alveoli.

Question 12

Alveoli (air sacs)

Answer 12

Tiny air sacs through which gas exchange takes place via the blood capillaries. The large number ensures that there is a large surface area for gas exchange.

Question 13

Diaphragm

Answer 13

A strip of muscle that forces the air to move into and out of the lungs.

Question 14

How is gas exchanged in the alveoli

Answer 14

Oxygen passes through the walls of the alveoli and into the blood capillaries by diffusion. Carbon dioxide passes the other way by diffusion

Question 15

How does smoking damage your lungs

Answer 15

It makes breathing difficult and causes lungs diseases includinh cancer

Question 16

Describe an experiment to show that carbon dioxide is produced during respiration

Answer 16

Test tube with a wire gauze with woodlice on it in the middle and and limewater below it.

The limewater turns milky-carbon dioxide was produced during respiration. Living organisms produce carbon dioxide.

Question 17

Describe an experiment to show that water is produced during respiration

Answer 17

Breath onto a small piece of glass.
Drops of liquid form.
The liquid turns blue cobalt chloride paper pink.

Question 18

Describe an experiment to compare the carbon dioxide levels of inhaled and exhaled air.

Answer 18

Blow through tube A. Time how long it takes to turn the limewater milky.
Suck through tube B. Time how long it takes to turn limewater milky.

Result: B takes much longer to turn limewater milky.

Conclusion: expired air contains more carbon dioxide than inspired air.