Brainscape's Knowledge GenomeTM

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


See full index

A Level Biology - 3.1.2 Transport in animals > Arteries, veins and capillaries > Flashcards

Arteries, veins and capillaries Flashcards

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

What is the outer layer of blood vessels called?

A

Tunica externa

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

What is the middle layer of blood vessels called?

A

Tunica media

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

What is the internal layer of blood vessels called?

A

Tunica interna

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

What is the tunica externa layer of the arteries?

A

It has a thick outer layer made of elastin and collagen

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

What is the tunica media of arteries?

A

A thick middle layer containing smooth muscle

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

What is the tunica interna of arteries?

A

Thin inner layer made of folded layer of endothelial cells

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

What is the lumen of arteries?

A

Smaller lumen relative to its diameter

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

What is the blood in arteries?

A

Oxygenated blood

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

What is the pressure in arteries?

A

Blood pressure interesting is high to reach extremities

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

What is the movement in arteries?

A

Fast movement of blood

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

What is the tunica externa of veins?

A

Thinner outer layer and thinner layer of elastin and collagen

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

What is the tunica media of veins?

A

Thinner middle layer and thinner layer of smooth muscle

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

What is the tunica interna of veins?

A

Thin inner layer made of endothelial cells

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

What is the lumen in veins?

A

Larger lumen relative to diameter

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

Are there valves in veins?

A

Yes

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

What is the blood in veins?

A

Deoxygenated blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the blood pressure in veins?

A

Relatively low blood pressure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the movement in veins?

A

Slower movement of blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the outer layer of capillaries?

A

No outer layer of elastin or collagen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the middle layer of capillaries?

A

No layer of smooth muscle

21
Q

What is the inner layer of capillaries?

A

Single layer of squamous endothelial cells

22
Q

What is the lumen in capillaries?

A

Larger lumen relative to diameter but very small

23
Q

What is the blood in capillaries?

A

Mix of blood

24
Q

What do arteries branch into?

A

Arterioles

25
Q

What do veins branch into?

A

Venules

26
Q

What is the structure in arteries?

A

Endothelium, collagen, elastic recoil, smooth muscles and elastic fibres

27
Q

What is the function of endothelium?

A

Can unfold when artery stretches during a heartbeat to allow changing volumes of blood as heart beats

28
Q

What is the function of collagen?

A

It helps artery walls to withstand the pressure of the blood

29
Q

What is the function of elastic recoil?

A

It helps maintain high blood pressure when heart relaxes to push blood along

30
Q

What is the function of smooth muscle?

A

Narrow or dilate lumen to thermoregulate

31
Q

How are lumen narrow or dilates?

A

Constrict or contract artery

32
Q

How does narrowing or dilating cause thermoregulation?

A

It limits blood to one area and redirects to a more active area

33
Q

What is the function of elastic fibres?

A

It allows artery to stretch and recoil as heart pumps

34
Q

What is the function of arterioles?

A

It links arteries and capillaries together

35
Q

What is the structure of arterioles?

A

More smooth muscle and less elastin in walls

36
Q

What is the function of vasodilation and vasoconstriction?

A

To regulate temperature

37
Q

What is the structure of veins?

A

Large lumen, thin layer of elastic tissue, thin layer of smooth muscle, valves and veins can be squeezed flat

38
Q

What is the function of large lumen?

A

Ease flow of blood

39
Q

What is the function of thin layer of elastic tissue?

A

They don’t need to stretch and recoil

40
Q

What is the function of thin layer of smooth muscle?

A

Do not need to constrict blood flow

41
Q

What is the purpose of valves?

A

They prevent back flow to help blood flow back to heart

42
Q

How can veins be squeezed flat?

A

By skeletal muscle contracting next to them to push blood along

43
Q

What is the capillary wall?

A

A single layer of flattened endothelial cells

44
Q

What are the size of gaps between endothelial cells?

A

Large, except in CNS where there are tight junctions

45
Q

What is the structure of capillaries?

A

Gaps between endothelial cells, very narrow lumen, small size and no valves

46
Q

What is the function of gaps between endothelial cells?

A

It allows exchange of materials between the blood and cells via tissue fluid

47
Q

What is the function of very narrow lumen?

A

Red blood cells are pressed up against capillary wall, reducing diffusion distance to help them give up oxygen

48
Q

What is the function of no valves and small size?

A

Cross sectional area of capillaries is huge with arterioles leading into capillaries slows blood down and blood loses pressure

A Level Biology - 3.1.2 Transport in animals (6 decks)

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