Feedback Control in the Cardiovascular System

Question 1

blood pressure

Answer 1

the outwards (hydrostatic) pressure exerted by the blood on the blood vessel walls

Question 2

Systolic BP

Answer 2

the pressure exerted by the blood on the walls of the aorta and systemic arteries when the heart contracts (norm. <140mmHg)

Question 3

Diastolic BP

Answer 3

the pressure exerted by the blood on the walls of the aorta and systemic arteries when the heart relaxes (norm. 30-50mmHg)

Question 4

Mean arterial blood pressure (MAP)

Answer 4

average arterial blood pressure during a single cardiac arrest (norm. 70-105mmHg)

Question 5

Why must MAP be regulated?

Answer 5

at leaat 60mmHg is needed to perfuse vital organs
if its too high, there is a strain in the heart/blood vessels

Question 6

Calculating MAP with diastolic and systolic

Answer 6

MAP= (2diastolic + systolic)/3

Question 7

calculating MAP from diastolic and pulse pressure

Answer 7

MAP= Diastolic+(pulse pressure/3)

Question 8

Hypertension

Answer 8

BP of 140/90mmHg or higher and a daytime average of 135/85mmHg or higher

Question 9

Baroreceptors

Answer 9

sense the changes in blood pressure (the stretch)