12.11 Haemoglobin

Question 1

Haemoglobin is…

Answer 1

Complex protein with a quaternary structure composed of 4 polypeptide units
Each contain a harm group

Question 2

Affinity means

Answer 2

Chemical attraction

Question 3

Haemoglobin has an affinity to…

Answer 3

Oxygen

Question 4

To be efficient at transporting oxygen Haemoglobin must…

Answer 4

Readily associate with oxygen at gas exchange surface and dissociate oxygen at respiring cells

Question 5

Percentage saturation of Haemoglobin with oxygen =

Answer 5

Oxygenate Haemoglobin/maximum saturation x 100

Question 6

Oxygen dissociation curve definition

Answer 6

Partial pressure of Oxygen

Question 7

Loading

Answer 7

When oxygen is taken up by Haemoglobin

Question 8

Unloading

Answer 8

When oxygen is given up by Haemoglobin

Question 9

Partial pressure of O2 is higher in…

Answer 9

Capillaries

Question 10

What is the s shaped curve described as

Answer 10

Sigmund curve

Question 11

the pO2 in the tissue capillaries is…

Answer 11

Lower only about 5 kPa

Question 12

Tissue cells respire…

Answer 12

Aerobically quickly reducing the dissolved O2 surrounding the tissue fluid

Question 13

This reduces the PO2 to

Answer 13

A lower level than normal