Blood

Question 1

What is blood and what 4 components

Answer 1

Specialised body fluid containing plasma, red blood cells, white blood cells and platelets

Question 2

What does blood plasma transport (3)

Answer 2

1. Soluble digestion products - (glucose from small intestine)
2. Carbon dioxide - (produced by aerobic respiration) from organs to lungs to be breathed out
3. Waste product - (urea from liver to kidneys to be excreted out in urine)

Question 3

What do red blood cells transport

Answer 3

Oxygen from lungs to body cells

Question 4

What do Red blood cells contain

Answer 4

Haemoglobin - oxygen carrying molecule

Question 5

How and where do you produce oxyhaemoglobin

Answer 5

Oxygen + haemoglobin -> oxyhaemoglobin
Lungs

Question 6

How are red blood cells specialised and why

Answer 6

No nucleus= more room for haemoglobin
Biconcave shape = greater surface area so oxygen can diffuse in and out rapidly

Question 7

What is the purpose of white blood cells

Answer 7

To form part of the immune system by making antibodies

Question 8

Why do white blood cells contain a nucleus

Answer 8

Because nucleus contains DNA which encodes the instructions white blood cells need

Question 9

What are platelets and what’s there purpose

Answer 9

Tiny fragments of cells and their job is to help the blood clot

Question 10

3 uses of donated blood

Answer 10

1. Replace blood lost during an injury
2. Some people are given platelets extracted from blood to help in clotting
3. Proteins extracted from blood can also be useful e.g. antibodies

Question 11

What things do you need to be careful about in blood transfusion

Answer 11

Make sure that the donated blood is the same blood type as the patients. Otherwise the body’s immune system will reject the blood- patient may die