transport of oxygen

Question 1

Where and how is oxygen transported in the body?

Answer 1

in the haemoglobin in red blood cells

Oxygen is absorbed into the blood in the alveoli
Oxygen diffusing into blood plasma enters. A red blood cells were Binds and associates with haemoglobin. This maintains concentration gradient because 02 is taken out of plasma.
Haemoglobin releases oxygen to provide cells for aerobic (dissociation)

Question 2

What are the properties of haemoglobin?

Answer 2

-quaternary structure, globular
-Four polypeptides
-each haem group containing iron ion in the middle
-One haemoglobin combined to for oxygen molecules, = high affinity of oxygen

Question 3

What is the term given to the concentration of oxygen within a mixture of gases?

Answer 3

Partial pressure of oxygen, PO2

Question 4

why does a fetus have a higher affinity of oxygen

Answer 4

Because when the blood from the mother reaches the placenta, it has a lower concentration of oxygen

Question 5

Describe the role of haemoglobin in transporting oxygen around the body

Answer 5

at the alveoli, oxygen can bind, reversibly and associate to haemoglobin forming oxyhaemoglobin

The oxygen can dissociate and be used up by respiring cells

Haemoglobin has a high affinity of oxygen