cardiac cycle

Question 1

what is diastole

Answer 1

relaxed heart muscle 0.5 secs
atria fill with blood
cuspid valves open
blood flow into ventricles
semi-lunar valve closes

Question 2

what is atrial systole

Answer 2

contracting heart imuscle 0.3sec
sa node impulses have control over atria
forcing blood into ventricles
semi-lunar valves remain closed

Question 3

what is ventricular systole

Answer 3

impulse reaches sa node to bundle of his and purkinjie fibres
a second contraction across ventricular walls
atrioventricular valves close semi lunar valve opens

Question 4

definition of heart rate

Answer 4

number of beats per min

Question 5

definition of max hr

Answer 5

hr max= 220-age

Question 6

definition stroke volume

Answer 6

volume of blood pumped out by the left ventricle of the heart per beat

Question 7

definition of cardiac output

Answer 7

volume of blood by the left ventricle pumped out of the heart in one min

Question 8

definition of heart rate reserve

Answer 8

difference between resting hr and max hr

Question 9

what is karvonens formula

Answer 9

calculate max hr=220-age

calculate HRR= max hr - HRR

Question 10

definition of end diastolic volume

Answer 10

volume of blood in the ventricles at the end of filling phase

Question 11

definition of end systolic volume

Answer 11

volume of blood left in the ventricle cat the end of the contraction phase

Question 12

what is cardiovascular drift

Answer 12

increase in HR that occurs during prolonged endurance exercise with little or no change in workload

Question 13

how do u calculate cardiovascular drift

Answer 13

stroke volume x heart rate

Question 14

how does cardiovascular drift happen

Answer 14

loose water through sweating, meaning blood become viscous