Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > B11 - Gas Exchange in humans > Flashcards

B11 - Gas Exchange in humans Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What do lungs provide? [1]

A

A gas exchange surface

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

What are the lungs protected by? [1]

A

The ribcage

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

Where in the lungs does gas exchange happen? [1]

A

Alveoli

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

What is the ribcage made up of? [2]

A
  • Ribs (bone)
  • Intercostal muscles
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the voice box called? [1]

A

Larynx

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

What is the function of the LARYNX? [2]

A

Air passes through here during breathing; vocal cords are found here.

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

What is the windpipe called? [1]

A

Trachea

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

What is the function of the TRACHEA? [2]

A

Tube carrying air to and from the lungs.

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

Why are there C shaped rings of cartilage around the trachea? [2]

A

To prevent the trachea from collapsing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the function of alveolus/alveoli? [2]

A

It is where gas exchange takes place; surrounded by capillaries.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are capillaries? [2]

A

Delicate blood vessels that exist throughout our bodies. They transport blood, oxygen and nutrients to cells in your organs and body systems.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the function of the bronchiole? [2]

A

They are small tubes transporting air between the bronchi and the alveoli.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the function of the diaphragm? [2]

A

It is a sheet of muscle below the ribcage involved in breathing/ventilation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the function of the lungs? [2]

A

They are large structures that provide the gas exchange surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the function of the bronchi/bronchus? [2]

A

They are 2 smaller tubes transporting air between the trachea to the bronchioles.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the purpose of lungs? [1]

A

To breathe

17
Q

Why do we need to breathe? [2]

A

To get oxygen in your body and carbon dioxide out.

18
Q

How do all of our cells get the energy they need to function? [1]

A

Cellular Respiration

19
Q

To carry out cellular respiration, what do you need? [1]

A

Oxygen

20
Q

What is the role of the lungs? [2]

A

To get oxygen that we need from the air all around us, into our bloodstream - where it can be transported to the rest of our body.

21
Q

What is a similarity between an alveolus and the blood capillaries right next to it? [2]

A

They both are made up of just one layer of very thin cells.

22
Q

What does one layer of thin cells increase? [2]

A

It increases the rate at which carbon dioxide and oxygen can diffuse across.

23
Q

How do alveoli have a very large surface area? [2]

A
  • Adults have hundreds of millions of alveoli
  • If all the alveoli were spread out flat - they would cover half a tennis court.
24
Q

Alveoli walls are ….. . What does this allow and what does this increase? [3]

A
  • Moist
  • Allows gases to dissolve
  • Increases the rate of diffusion
25
Q

What is CO2 being carried by? [1]

A

The plasma

26
Q

What 5 things make alveoli good for gas exchange? [5]

A
  1. Large Surface Area
  2. Very thin
  3. Moist Lining
  4. Good supply of blood
  5. Good ventilation
27
Q

How do alveoli have a good supply of blood? [2]

A

Each one of the alveoli has lots and lots of capillaries surrounding it.

28
Q

How do alveoli have good ventilation? [2]

A

This means good supply of air which is supplied by breathing.

29
Q

Where are oxygen and carbon dioxide exchanged? [2]

A
  • The lungs
  • The tissues of the body
30
Q

In which direction does the oxygen exchange happen? [2]

A

Air in lungs –> blood –> tissues

31
Q

In which direction does the carbon dioxide exchange happen? [2]

A

Tissues –> blood –> air in lungs

32
Q

How do gases move across the wall of the alveolus? [1]

A

Diffusion

33
Q

What is diffusion? [3]

A

Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration as a result of random movement until an equilibrium is reached.

34
Q

What are 3 ways diffusion happens quickly? [3]

A
  1. Short distance
  2. Large surface area
  3. Steep concentration gradient
35
Q

What is limewater used for?

A

Testing of carbon dioxide.

36
Q

What happens to limewater if there is carbon dioxide present? [2]

A

The limewater turns cloudy/milky.

37
Q

Exhaled air contains (3 things) than inhaled air. [3]

A
  1. less oxygen
  2. more carbon dioxide
  3. a little more water vapour

Biology (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions