pe (aos3) Flashcards
cardiorespiratory system
ventilation
the amount of air breathed per minute
respiratory rate
the amount of breaths per minute
tidal volume
the size of each breath.
diffusion
the movement of molecules from a high concentration to a low concentration.
where does diffusion take place
the movment of oxygen from the alveoli into the blood stream.q
cardiac output
the amount of blood pumped out of the heart per minute.
what are the two factors of cardiac output
heart rate and stroke volume
heart rate
the amound of beats per minute.
stroke volume
the amount of blood pumped out of the heart per beat.
what happens during cardiac output (relate it to blood redistribution)
as more blood is pumped out of the heart to the arteries, the blood is able to undergo blood redistribution
vasodilation
The widening of blood vessels (arteries) to allow blood flow into the working muscles.v
blood redistribution
the redirection of blood from non-working muscles/organs to working organs/muscles. It supplies the right organs/muscles with the oxygen that it demands.
vasoconstriction
The narrowing of blood bessels (arteries) to prevent blood from flowing into the non-working muscles.
what happens during blood redistribution (relate it to avO2 difference)
as blood redistribution increases, the muscles/organs that demand oxygen supply recieve it, for then avO2 difference to take place.
avO2 difference.
avO2 difference is the difference in variance of oxygen content in arterial blood and venous blood. It reflects how much oxygen has been used up by the tissue.
what happens during avO2 difference (relate it to venous return)
As avO2 difference increases, it is registered how much oxygen content is available in blood for then venous return to take place accordingly.
venous return
returns deoxygenated blood through the veins to the heart for it to then be transported tot eh lungs to get oxygenated.
Altitude training + negative
A legal aerobic exercise that takes place at hihg altitude and increases the amount of red blood cells.
Costs too much money.
EPO + negative
An illegal hormone that is produced in the kidney to stimulate production of RBC in the bone marrow.
It can create blood clots
Blood Doping + negative
increasing RBC in the body by increasing the haemoglobin in blood (helps deliver oxygen to muscles)
