Brainscape's Knowledge GenomeTM

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


See full index

gcse biology > B4 Organising animals and plants > Flashcards

B4 Organising animals and plants Flashcards

You may prefer our related Brainscape-certified flashcards:
GCSE Religious Studies - Edexcel Route A flashcards GCSE Religious Studies - Eduqas Route A flashcards AP® Biology flashcards GCSE Geography - AQA flashcards Biology 101 flashcards GCSE Religious Studies - Edexcel Route B flashcards GCSE Religious Studies - Eduqas Route B flashcards
1
Q

Blood is a unique tissue based on a liquid called…..

A

plasma

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

Plasma carries what blood components

A

Red Blood Cells, White Blood Cells, Platelets

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

How much blood does the average person carry?

A

4.7 - 5.0 litres of blood

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

What is blood plasma

A

A yellow liquid that transports all of your blood cells and some other substances around your body

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

What does blood plasma transport?

A

Waste carbon dioxide
urea
amino acids
glycerol
fatty acids
etc.

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

What percent of blood is plasma

A

55%

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

What percent of blood is red blood cells

A

45%

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

What percent of blood is white blood cells and platelets

A

<1%

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

What do red blood cells do?

A

Pick up oxygen from the air in your lungs and carry it to the cells where it is needed.

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

How are red blood cells adapted?

A

Biconcave discs - increased surface area
Haemoglobin - binds to oxygen
No nucleus - more space for haemoglobin

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

What is the difference in size between white blood cells and red blood cells

A

White blood cells are much bigger

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

How many red blood cells are there compared to whit blood cells?

A

much more

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

What are the 2 types of white blood cells

A

Lymphocytes & phagocytes

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

What do lymphocytes do

A

Form antibodies against microorganisms. Some form antitoxins against poisons made by microorganisms

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

What do phagocytes do

A

engulf and digest invading bacteria and viruses

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

What are platelets?

A

Small fragments of cells

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

Do platelets have a nucleus

A

no

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

What do platelets do?

A

help to form clot blots at site of wound

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

What is blood clotting

A

A series of enzyme-controlled reactions that results in converting fibrinogen into fibrin

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

How does blood clotting occur?

A

The enzyme-controlled reaction produces a network of protein fibres that capture lots of red blood cells and more platelets to form a jelly-like clot that stops you bleeding to death

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What does the clot harden to form?

A

scab

22
Q

What does the scab do?

A

Protects the new skin as it grows and stops bacteria entering the blood through the wound

23
Q

What makes up the human circulatory system?

A

blood, blood vessels and heart

24
Q

What do arteries do?

A

Carry blood away from the heart to the organs of your body - usually oxygenated blood - red colour

25
Q

What do the arteries do when blood flows through them?

A

Stretch as blood is forced through & go back to shape after

26
Q

What structure do arteries have?

A

Thick wall containing muscle and elastic fibres

27
Q

Why dangerous if artery is cut?

A

The blood will spurt out rapidly every time the heart beats

28
Q

What do veins do?

A

Carry blood from organs to your heart - usually low oxygen so deep purple/red colour

29
Q

Do veins have a pulse?

A

no

30
Q

Do veins have thicker or thinner walls than arteries

A

Thinner

31
Q

Do veins have valves?

A

yes

32
Q

What do valves do?

A

Prevent the backflow of blood

33
Q

What do valves do when blood flows?

A

Pushed open

34
Q

What do valves do when blood starts flowing backwards

A

Closes to prevent it

35
Q

How does blood go back to the heart?

A

squeezed back towards heart by action of skeletal muscles

36
Q

Where are capillaries?

A

Throughout the body

37
Q

What size are capillaries compared to veins and arteries?

A

much smaller

38
Q

What size walls do capillaries have?

A

very thin walls

39
Q

Why do capillaries have small walls?

A

To make the diffusion of glucose and oxygen into cells easier

40
Q

What substances are produced by cell which passes back into blood through walls of capilleries?

A

carbon dioxide

41
Q

How is the circulatory system arranged in humans?

A

Double circulatory system

42
Q

What do the two transport systems in a double circulatory system do?

A

-carries blood from heart to lungs and back, allowing oxygen to be exchanged with air in lungs
-carries blood from heart to other organs in body and back

43
Q

What type of animal is double circulation vital for?

A

warm-blooded, active animals

44
Q

What does the double circulatory system increase?

A

efficiency

45
Q

What supplies the walls of your heart with oxygen?

A

coronary arteries

46
Q

Where does blood enter your heart?

A

atria

47
Q

Where does blood going into the right atrium come from?

A

vena cava

48
Q

Does the vena cava carry oxygenated or deoxygenated blood?

A

deoxygenated

49
Q

What blood vessel pumps blood into your left atrium?

A

pulmonary vein

50
Q

When the atrium contract what happened?

A

forces blood backwards out the heart

51
Q

What do valves do?

A

stop backflow of blood

52
Q
A

gcse biology (18 decks)

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