1.2 functions of blood

Question 1

what does blood transport?

Answer 1

gases such as oxygen and carbon dioxide between tissues and the lungs. Also transport hormones

Question 1

What is haemoglobin

Answer 1

an iron-containing protein that combines with oxygen to produce oxyhaemoglobin . Can carry small amount of carbon dioxide after passing the lungs.

Question 2

Red blood cells structure

Answer 2

have no nucleus to increase space for oxygen.
special disc shape to help the exchange of oxygen

Question 3

what are the 2 types of lipoproteins?

Answer 3

high density (HDL) and low density (LDL)

Question 4

what do lipoproteins do?

Answer 4

transport fat to tissues where it is needed for energy

Question 5

LDL (bad)

Answer 5

appears to deposit fat and cholesterol in the wall of arteries.

Question 6

HDL (good)

Answer 6

appears to prevent or reverse these harmful deposits

Question 7

Hormones

Answer 7

eg insulin and adrenalin which are chemicals produced by glands.
They travel in blood to target organs where they trigger a response or initiate a process like fertility or growth.

Question 8

Temperature regulation

Answer 8

• carries heat from one part body away
• blood vessels dilate (open) when hot = loses heat,
  close to your skin
• blood vessels constrict when cold

Question 9

Preventing infection (WBC)

Answer 9

• engulf bacteria = neutrophils
• produce antibodies = lymphocytes
• produce antitoxins to fight poison such as vomit and diarrhoea

Question 10

Blood clotting

Answer 10

forms blood clots to prevent excess of blood loss

Question 11

what does do with waste products?

Answer 11

bring waste products to the kidney and the liver, which filter and clean blood.