Anatomy - CV System

Question 1

Rest , sub max and max SV values

Answer 1

70 ml
100ml
140ml

Question 2

HR at rest , submax , max

Answer 2

70bpm
150bpm
200bpm

Question 3

Pathway of blood through the heart (from LV)

Answer 3

Out LV through the Aorta to body(oxygenated)
In Vena cava into right ventricle (deoxygenated)
Out pulmonary artery in right ventricle to lungs (deoxygenated)
In pulmonary vein into left atrium (oxygenated)

Question 4

Explain the function of Baro,chemo and proprio receptors

Answer 4

Chemoreceptors detect chemical changes like increased/decreased ph or co2 levels
Baroreceptors detect pressure changes through the stretch of the artery walls
Proprioreceptors detect changes in stretch in spindle fibres when activity happens

Question 5

Name an intrinsic factor in the CCC

Answer 5

Thermoreceptors detect change in temperature

Question 6

Name a hormonal factor in the CCC

Answer 6

Adrenoceptors detect change in adrenaline causing more contractions of the heart

Question 7

Describe the heart rate changes seen on a graph during exercise

Answer 7

Anticipatory rise
Rapid increase in HR due ti increased o2 demands
Plateau due to supply meeting demand

Question 8

Explain the role of the Vascular shunt mechanism for when a cyclist begins a race

Answer 8

Controlled by VCC
Arterioles + Pre capillary sphincters at working muscles in the legs vasodilate
Increasing blood flow due to increased O2 demand
Arterioles + Pre capillary sphincters at the non essential organs and muscles vasoconstrict due to decreased oxygen demand.