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5 Cards in this Set

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What happens moving from a supine to a standing position?
There is an acute fall in arterial blood pressure that is sensed by arterial baroreceptors located in the carotid sinuses and aortic arch.
If a person has been exercising for 1 hour, which organs experience the smallest decrease in blood flow?
The brain and heart are the 2 organs that maintain their blood flow.
What is the relationship between exercise and adenosine?
The increase in local metabolism during exercise causes cells to release vasodilator substances such as adenosine. This increases arteriolar diameter, vascular conductance and blood flow to skeletal muscles.
What occurs when there is an increase in sympathetic activity to peripheral vessels?
There is an increase in total peripheral resistance. Increase in renal sympathetic nerve activity results in an increase in renin release(plasma renin activity) and a decrease in renal blood flow.
Which specific cardiac conditions are heard in either systole or diastole.
Mitral regurg/aortic stenosis/ventricular septal defect murmur are heard in systole.
Tricuspid valve stenosis/PDA are usually heard during diastole. PDA can occasionally be heard during systole.