The relationship between CV and RS

Question 1

what is enlargement of the right side of the heart due to?

Answer 1

the high blood pressure in the pulmonary blood vessels, usually caused by chronic lung disease

Question 2

why does partial pressure drop off in the lungs?

Answer 2

humidification in the lungs

Question 3

what is the V/Q ratio?

Answer 3

Ventilation(V) - (ability of the lungs to take the air and gas exchange to occur)
Perfusion (Q) - blood supply

Question 4

is oxygen soluble in plasma?

Answer 4

Not very

Question 5

What is the blood that is not dissolved in plasma transported by?

Answer 5

haemoglobin

Question 6

what does deoxygenation of blood increase?

Answer 6

the ability to carry carbon dioxide (haldane effect)

Question 7

what percentage of haemoglobin in arterial blood is saturated with O2

Answer 7

98.5%

Question 8

what percentage of haemoglobin in venous blood is saturated with O2?

Answer 8

75%

Question 9

what is the affect of O2 affinity changes?

Answer 9

Shift right - less loading of O2 and more unloading (increased affinity)

Shift left - more loading of O2 and less unloading (decreased affinity)

Question 10

what is the effect of temperate of O2 saturation?

Answer 10

Higher temp
- active tissues
- shift right
- more unloading of O2 in tissues
- more O2 delivery to tissues

Question 11

what is the effect of pH on O2 saturation?

Answer 11

• Bohr effect (lower affinity)
  • lower pH increases O2 unloading
• Active tissues
  •produce more acid pH decreases in tissues
  • decreased pH causes shift right in saturation curve
  • more O2 is unloaded to tissues

Question 12

how do you calculate pulse pressure?

Answer 12

Systolic - diastolic

Question 13

how do you calculate mean arterial pressure?

Answer 13

MAP = diastolic + 1/3 pulse pressure