People often become lightheaded at the end of very severe exercise in the upright posture (e.g.
cross country skiing). Is this most likely due to:
i. Too rapid of a decrease in HR
ii. A failure of venous return to maintain EDV
iii. A rapid increase in SBP
iv. A sudden decrease in SVR
Solution
iii. A rapid increase in SBP
Reason - Increase in oxygen demand by the muscle which increase the rate of hearbeat i.e
increase in HR. this increase heartbeat exerts more force so that more blood come out. this cause
increase insystolic blood pressure..
People often become lightheaded at the end of very severe exercise i.pdf
1. People often become lightheaded at the end of very severe exercise in the upright posture (e.g.
cross country skiing). Is this most likely due to:
i. Too rapid of a decrease in HR
ii. A failure of venous return to maintain EDV
iii. A rapid increase in SBP
iv. A sudden decrease in SVR
Solution
iii. A rapid increase in SBP
Reason - Increase in oxygen demand by the muscle which increase the rate of hearbeat i.e
increase in HR. this increase heartbeat exerts more force so that more blood come out. this cause
increase insystolic blood pressure.
