Gas Exchange In Humans Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

The role of the intercostal muscles

A

When you breathe in they move out and up to allow more space inside the lungs for air to come in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Role of the diaphram?

A

When you breathe in it is pulled down to pull air in and increase the volume of the lungs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How are alveoli adapted for their function?

A

Massive surface area more can be diffused at once

Moist lining for dissolving the gases

Very thin walls

Copious blood supply

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Biological consequences of smoking?

A
Tar in the lungs:
Stops the cilia working-more dirt stays in the lungs and bacteria gets trapped in the lungs causing
Lung cancer
Emphysema
Pneumonia

Carbon monoxide
Creates carboxyhemoglobin
Oxygen deficiency in blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Lung cancer?

A

Chemicals in the tar trapped in the lungs cause damage to the DNA of lung cells

Cells may grow and divide abnormally
In time that grown into cancer

Cancer blocks bronchioles and prevent air reaching the alveoli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Emphysema?

A

Tar trapped in lungs damages alveoli

The walls between them break down

The alveoli air spaces get bigger but there are less of them

Fewer alveoli means less surface area for gas exchange

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Bronchitis?

A

Inflammation of the mucous membranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Coronary heart disease?

A

Fatty deposits build up in the walls of the arteries that run to your heart

This causes them to shrink-reduces the supply of oxygen to your heart

May lead to a heart attack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Experiment to investigate the effect of exercise in breathing in humans

A

Measure breath rate in different exercise rates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly