Lecture 10

Question 1

what is cardiac output?

Answer 1

the amount of blood the heart pumps out per minute

Question 2

what happens to cardiac output during exercise?

Answer 2

greatly increases

Question 3

what is stroke volume?

Answer 3

contraction strength

Question 4

what is heart rate?

Answer 4

contraction speed

Question 5

what is the cardiac output equation?

Answer 5

CO = SV x HR

Question 6

what is the flow equation?

Answer 6

flow = pressure difference / resistance

Question 7

what is MAP?

Answer 7

mean arterial blood pressure

Question 8

what is the homeostasis of mean arterial blood pressure like?

Answer 8

tightly regulated / not much flucuation

Question 9

mean arterial blood pressure equation?

Answer 9

MAP = CO x TRP

arterial pressure = cardiac output x total pressure resistance

Question 10

what detects the mean arterial blood pressure?

Answer 10

baroreceptors = blood pressure receptors

Question 11

are baroreceptors tonically or phasic?

Answer 11

tonically active - going all the time

Question 12

where is the information that the baroreceptors detect sent to ?

Answer 12

sent to the brainstem

Question 13

what does the parasympathetic (vagus nerve) do in the control of cardiac output?

Answer 13

decreases heart rate

Question 14

what does sympathetic nerves do in control of cardiac output?

Answer 14

speeds heart rate and increases stroke volume

Question 15

where are baroreceptors found?

Answer 15

carotid artery and aorta