neural control

Question 1

medualla oblagata

Answer 1

ccc loacted inside

Question 2

chemoreceprots

Answer 2

detect chemical changes
detect changes in c02 in blood
if increased, singal medualla, signal SNS, increase HR

Question 3

baroreceptors

Answer 3

detect changes in blood pressure
establsih set point for blood pressure
any increase/decrease from set point, signal medulla
increase in arterial pressure, increase in stretach of baroreceptors, decrease in HR
decrease in arterial pressure, decrease un streth iif baroreceptors, increase in HR

Question 4

propriorecptors

Answer 4

found in muscles and tendons
detect chnages in movment
increase in movment, send imulsue to medulla, sends impulse to SNS, increasing HR

Question 5

hormonal control

Answer 5

release of adrenaline
released by sympathetic nerve and cardiac nerve during exercise
stimulates SA node
increases speed and force of contraction
increasing cardiac ouput

Question 6

effects of physical activity on stroke volume, heart rate and caradic ouput

Answer 6

stroke volume-volume of blood leaving heart per contraction
venous return increases-more blood leaves heart, more blood retrunign to heart

elasticity of cardiac muscle(starlings law)_increased venous return, greater diastollic phase, greater stretch of cardiac muscle, greater force of contraction, greater ejection fraction
(5 STAGES)

Question 7

WHAT Is venous return

Answer 7

volume of blood returning to heart via the veins

Question 8

effect of cariac ouput during exercise

Answer 8

cardiac ouput-volume of blood eaving heart ventricles per minute
as exercise intensity increases, HR alos increases up to max level
max hr-calculated by 220-age