3.3.4.1 Mass transport in animals

Question 1

describe the structure of haemoglobin

Answer 1

a protein with a quaternary structure - made up of 4 polypeptide chains. each chain has a haem group containing an iron ion

Question 2

where is haemoglobin found?

Answer 2

in red blood cells

Question 3

how many oxygen molecules can a human haemoglobin carry?

Answer 3

each molecule of human haemoglobin can carry 4 oxygen molecules

Question 4

what is the role of haemoglobin in the body?

Answer 4

to carry oxygen around the body

Question 5

how is oxyhemoglobin formed?

Answer 5

when oxygen in the lungs binds to the iron ion in the haem groups within the haemoglobin

Question 6

where is oxyhemoglobin formed?

Answer 6

in the lungs

Question 7

when does oxygen leave the oxyhemoglobin?

Answer 7

oxygen leaves the oxyhaemoglobin near the body cells turning it back to haemoglobin

Question 8

what is the process called in which an oxygen molecule binds to the iron ions in haemoglobin?

Answer 8

association / loading

Question 9

what is the process called in which oxygen leaves the oxyhaemoglobin?

Answer 9

dissociation / unloading