Cardiovascular and respiratory

Question 1

pulmonary circuit

Answer 1

heart and lungs

circulation of the blood, pulmonary a
to lungs
and pulmonary veins
back to heart

Question 2

systemic circuit

Answer 2

heart and body

circulation of blood, aorta
to body
vena cava
back to heart

Question 3

heart = MYOGENIC

Answer 3

generates its own electrical impulse
causes the cardiac muscle to contract

Question 4

conduction system

Answer 4

SA
AV
bundle of his
bundle branches
purkinje fibres

Question 5

diastole

Answer 5

relaxation phase
heart fills with blood - passively

Question 6

systole

Answer 6

contraction phase
blood forcible ejected - aorta and pulmonary artery

atrial
ventricular

Question 7

HR
typical value

Answer 7

number of time a heart beats per minute
72 bpm

Question 8

SV
typical value

Answer 8

amount of blood ejected from LV per beat
70 ml

Question 9

Q
typical value

Answer 9

amount of blood ejected from LV in one minute
5l/min

Question 10

magic equation - heart

Answer 10

HR x SV = Q

Question 11

brady cardia

Answer 11

heart rate below 60 bpm

Question 12

maximum HR

Answer 12

220-age = HR max (bpm)

Question 13

HR of untrained (rest)

Answer 13

70-72 bpm

Question 14

HR of trained (rest)

Answer 14

50 bpm

Question 15

SV of trained (rest)

Answer 15

50 ml

Question 16

SV untrained (rest)

Answer 16

70 ml

Question 17

Q trained (rest)

Answer 17

5l/min

Question 18

Q untrained (rest)

Answer 18

5l/min

Question 19

HR in response to exercise

Answer 19

increases in proportion to intensity until max HR is reached

Question 20

SV response to exercise

Answer 20

increased in proportion to exercise until plateau is reached
at 40-60% of working capacity

Question 21

why does SV increase

Answer 21

venous return
frank starlings law

Question 22

venous return

Answer 22

return of blood to the RA through the veins

Question 23

frank starlings law

Answer 23

increase VR = increase SV
= increase stretch in ventricular walls
= increased force of contraction