Circulatory ssytem Flashcards
What is the function of heart valves
Prevent unwanted back flow of blood to the heart
What to the valves in the heart open and close in response to
Changes in pressure
What are the atrioventricular valves for
Preventing back flow of blood between arteries and ventricles (increased pressure)
What are the semilunar valves for
prevent blood flow when there is a drop in pressure
What is coronary circulation
Circulation of blood to the heart
Where do the coronary arteries branch from
Base of the aorta
Where does the right coronary artery supply blood to
Myocardium of right ventricle
Where does the left coronary artery supply blood to
Left Ventricle and posterior of heart
What is a reduction in blood flow called
ischaemia
What is vascular disease
The narrowing of the blood vessels which decreases performance
What is another word for hardening of arteries
atherosclerosis
Why do blood vessels narrow
Due to deposition of plaques as the body tries to repair damaged vessels
What is cardiac output
The volume of blood pumped per minute
What is peripheral resistance
The resistance to flow offered by the blood vessels
What blood pressure gives an indication of the strain on vessels when the heart is trying to pump
Systolic
What is optimal blood pressure
120/80
What is normal blood pressure
130/85
What blood pressure indicates stage 1 hypertension
140-159/90-99
What happens to SBP during exercise
It increases linearly with exertion levels
What happens to DPB during exercise
it can decrease due to vasodilation
What happens to DPB during exercise to individuals suffering from hypertension
It increases
What can cause a rapid increase in blood pressure
Valsalva effect
What are the long term effects of exercise on BP
Endurance and rhythmic training helps reduce BP over time
Weight training alone does not reduce BP
How does endurance training effect the Cardiovascular system
Increased stroke volume stronger heart lower resting heart rate increased blood supply to tissue Increased oxygen carrying potential
