bp

Question 1

define blood pressure

Answer 1

the pressure exerted by blood on the wall of a blood vessel

Question 2

what is blood pressure measured in

Answer 2

mmHg

Question 3

define systolic blood pressure

Answer 3

is the highest pressure and is measured when the left ventricle is contracting and expelling blood into aorta

Question 4

define diastolic blood pressure

Answer 4

the lowest blood pressure measured when left ventricle is relaxing and blood is flowing into peripheral blood vessels

Question 5

what is the device called that measure bp

Answer 5

sphygmomanometer

Question 6

what does PP stand for

Answer 6

Pulse Pressure

Question 7

define pulse pressure

Answer 7

the difference between systolic and diastolic pressure

Question 8

what is a text book pp

Answer 8

120/80=40mmHg

Question 9

what is mean arteriole pressure

Answer 9

pressure that propels the blood through tissue

Question 10

what does map stand for

Answer 10

mean arteriole pressure

Question 11

what is map equivalent too

Answer 11

diastolic bp- 1/3 pp = MAP

Question 12

how many factors can affect blood pressure and explain 3

Answer 12

6
cardiac output- more blood your heart pumps the higher the pressure
peripheral resistance- vasoconstriction and increased length of bv means greater bp, opposite for vasodilation.
blood volume- increased vol=increased press
viscosity-thicker means harder to pump=increase
vasoconstriction/dilation

Question 13

which receptor monitors bp

Answer 13

baro-receptors

Question 14

explain the homeostatic loop for low blood pressure detection

Answer 14

1. arteriole pressure falls, 2. baroreceptors inhibited, 3. impulse from baroreceptors stimulate cardioacceleratory centre and vasomotor centre, 4. increase HR, contractility and cardiac output, 5. increased bp to normal level

Question 15

what is Marleys law

Answer 15

there is an inverse relationship between bp and hr

Question 16

explain Marleys law

Answer 16

if bp too high, hr will decrease
if bp too low, hr will increase

Question 17

what does SV stand for

Answer 17

stroke volume

Question 18

define stroke volume.

Answer 18

the amount of blood ejected from the ventricle during one contraction

Question 19

the equation for sv

Answer 19

sv= edv-esv
stroke vol= end diastolic vol- end systolic vol

Question 20

what does preload mean

Answer 20

the degree to which ventricular muscle is stretched just before contraction

Question 21

define afterload

Answer 21

the pressure that ventricles must overcome to push blood through semi-lunar valves

Question 22

what is the pressure exerted by the left and right ventricles retrospectively

Answer 22

left exerts= 80mmHg as pushed round body
right exerts= 8mmHg as pushed to lungs

Question 23

name 2 factors that enhance cardiac output

Answer 23

exercise , decreased BP

Question 24

which receptor detects increased muscle activity

Answer 24

proprioceptors

Question 25

what does excess co2 cause

Answer 25

acidosis

Question 26

which receptors detect acidosis

Answer 26

chemoreceptors - increase Q and rest rate to reduce excess co2