gas transport

Question 1

respiratory and circulatory systems contain unique anatomical and physiological properties to facilitate gas diffusions, what are these?

Answer 1

• large SA
• large partial pressure gradient
• gasses with advantageous diffusion properties

Question 2

oxygen is carried in the blood in 2 forms, what are these?

Answer 2

• dissolved

- bound to haemoglobin

Question 3

amount of dissolved oxygen in blood is proportional to what?

Answer 3

partial pressure

Question 4

what is the major transport molecule for oxygen in RBC?

Answer 4

haemoglobin

Question 5

describe the structure of haemoglobin?

Answer 5

4 haeme groups (iron porphyrin compound) joined to globulin protein (2 alpha and 2 beta chains)

Question 6

what is used to measure oxygen saturation?

Answer 6

pulse oximeter

Question 7

what is the respiratory exchange ratio?

Answer 7

ratio of expired CO2 to oxygen uptake

Question 8

what is a normal respiarory exchange ratio?

Answer 8

0.8

Question 9

CO2 is carried in 3 forms, what are they?

Answer 9

• dissolved
• bound to haemoglobin
• as bicarbonate

Question 10

a build up of bicarbonate in RBCs causes what?

Answer 10

inhibition of CO2 production

Question 11

what shape is the oxygen dissociation curve?

Answer 11

s shaped