2 Organisation - Animals and Plants Flashcards Preview

AQA Biology Paper 1 11-1A > 2 Organisation - Animals and Plants > Flashcards

Flashcards in 2 Organisation - Animals and Plants Deck (58)
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1

What is plasma in the blood?

Yellow liquid that carries blood cells, proteins and dissolved substances around the body

2

What are red blood cells?

Biconcave cells that have haemoglobin - carry oxygen

3

Name the pigment found in red blood cells that binds to oxygen.

Haemoglobin

4

Which organ system transports substances to and from body cells?

Circulatory system

5

State the functions of white blood cells.

Engult pathogens, produce antibodies and antitoxins

6

How does being biconcave help red blood cells with their function?

Increase SA:V for efficient diffusion

7

How is not having a nucleus good for red blood cells?

More space to pack more haemoglobin

8

State the function of platelets.

Blood clotting

9

Name the blood vessel type that carries blood from the heart to other parts of the body.

Artery

10

Name the blood vessel type that carries blood from the organs back to the heart.

Vein

11

Name the blood vessel type that is found within organs that link arteries and veins.

Capillaries

12

State a structural difference between arteries and veins.

A: thicker walls, more elastic tissue, no valves; V: thinner walls, less elastic tissues, have valves

13

State a difference in the blood flowing in arteries and veins.

A: oxygenated, more nutrients, less wastes; V: deoxygenated, less nutrients, more wastes

14

The flow of blood in veins relies on ??????

Skeletal muscle contraction

15

Why can substances diffuse easily between capillaries and the cells?

Thin capillary walls (one cell thick)

16

What is the double circulatory system?

One part carries blood between heart and lungs; the other carries blood between heart and other organs

17

Name the vessels that supply oxygen to the heart muscles.

Coronary arteries

18

Name the large vessel that brings deoxygenated blood back into the heart.

Vena cava

19

Name the upper chambers of the heart.

Atria

20

Name the lower chambers of the heart.

Ventricles

21

Name the vessel that brings deoxygenated blood from the heart to the lungs.

Pulmonary artery

22

Name the vessel that brings oxygenated blood from the lungs to the heart.

Pulmonary vein

23

Which side of the heart has deoxygenated blood - right or left?

Right

24

Describe the flow of blood as atria of the heart contract.

Blood flows from atria down to ventricles

25

Name the large vessel that brings oxygenated blood out of the heart to the body.

Aorta

26

Why is the muscle wall of the left ventricle thicker than the right ventricle?

To generate more pressure to force blood all over the body (left side only to lungs)

27

What is the function of heart valves?

Prevent backflow of blood

28

Name a method to unblock a coronary artery in the heart.

Stent

29

Name a drug that reduces blood cholesterol levels.

Statins

30

What can be used to replace a damaged heart valve?

Biological or mechanical valves