Exercise Physiology - Cardiovascular

How blood flow is redistributed when exercising (pick 2)

• arterioles vasodilate to direct blood to active muscles

• veins will vasodilate so blood goes to digestive system

• arteries will send blood to the brain

• arterioles vasoconstrict to direct blood away from inactive organs

what is the effect of Starling's Law on stroke volume (pick 2)

• venous return (blood back to heart) increases

• cardiac output lowers with less blood

• stroke volume will increase as more blood fills the heart

• stroke volume will decrease

what is starlings law?

• when we breath in deeper we breath out harder

• As the heart fills with blood it wont pump harder

• As the heart fills with more blood it will force the blood out faster

• diastolic and systolic is the same

what is systole and diastole (pick 2)

• systole is when the heart forces blood in to the atria

• diastole is when the heart contracts

• diastole is when the heart is relaxed and fills with blood

• systole is when the ventricles contract and force blood out

what is the effect of capillarisation on diffusion rate in the working muscles

• more capillaries decreases the exchange of gases in the muscle

• less capillaries will help diffusion

• more capillaries will increase gas exchange and diffusion in the muscle

• more capillaries will have no effect in the diffusion rate

what will happen to blood pressure during isometric contraction

• increases

• decreases

• no change

which response occurs first in the body when we exercise

• heart rate lowers

• anticipatory rise from adrenaline

• blood pressure increases

• adrenaline lowers

What is the equation for cardiac output

• CO = BP x BR

• Q = HR x TV

• Q = SV x HR

• CO = HR x SV

why does blood flow change during exercise (pick 2)

• increase delivery of O2 to working muscles

• decrease stroke volume

• removal of CO2/waste from the muscles

• decrease breathing rate

Functions of the CV system (pick 3)

• Directs blood

• Transports O2 and nutrients

• helps us breath faster

• removes waste products

• slows down the brain