2.3 Transport In The Blood Flashcards Preview

GCSE Biology 3.2 Transporting Materials > 2.3 Transport In The Blood > Flashcards

Flashcards in 2.3 Transport In The Blood Deck (18)
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1
Q

What is blood made up of?

A
  • plasma
  • red cells
  • white cells
  • platelets
2
Q

What is blood?

A

A tissue

3
Q

What does plasma transport?

A
  • carbon dioxide from organs to lungs
  • soluble products of digestion from small intestine to other organs
  • urea from liver to kidneys
4
Q

Where is urine made?

A

The kidneys

5
Q

Describe the physical appearance of red blood cells

A

Res biconcave discs

6
Q

Name a cell in the bloodstream that does not have a nucleus

A

Red blood cell

7
Q

Why are red blood cells red?

A

They contain the pigment haemoglobin, which is red

8
Q

How do red cells use haemoglobin?

A

It combines with oxygen to form oxyhemoglobin (in the lungs) to carry the oxygen. Then splits up when oxygen is needed in the organs

9
Q

Why don’t red blood cells have nuclei?

A

So they can carry more haemoglobin so they can carry more oxygen

10
Q

Why are red blood cells biconcave?

A

So they can fit through the capillaries

11
Q

Why can’t red blood cells repair themselves?

A

They don’t have a nucleus

12
Q

What happens to the oxygen when the blood travels past the lungs?

A

Oxygen diffuses into the bloodstream because it has a lower concentration than of oxygen than the lungs. When in the bloodstream, oxygen sticks to the haemoglobin to form oxyhemoglobin

13
Q

What happens to the oxygen when the blood travels past muscles?

A

The oxygen diffuses into the tissues and cells as it has a lower oxygen concentration than the bloodstream. The oxyhemoglobin splits up into oxygen and haemoglobin

14
Q

What do white blood cells contribute to in the body?

A

The body’s defence system against microorganisms

15
Q

What are platelets?

A

Small fragments of cells

16
Q

Do platelets have a nucleus?

A

No

17
Q

What do platelets do?

A

Help clot blood at the site of a would

18
Q

What do platelets do when there’s a tear in the tissue?

A

Go sticky