Circulatory ssytem Flashcards

1
Q

What is the function of heart valves

A

Prevent unwanted back flow of blood to the heart

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2
Q

What to the valves in the heart open and close in response to

A

Changes in pressure

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3
Q

What are the atrioventricular valves for

A

Preventing back flow of blood between arteries and ventricles (increased pressure)

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4
Q

What are the semilunar valves for

A

prevent blood flow when there is a drop in pressure

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5
Q

What is coronary circulation

A

Circulation of blood to the heart

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6
Q

Where do the coronary arteries branch from

A

Base of the aorta

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7
Q

Where does the right coronary artery supply blood to

A

Myocardium of right ventricle

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8
Q

Where does the left coronary artery supply blood to

A

Left Ventricle and posterior of heart

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9
Q

What is a reduction in blood flow called

A

ischaemia

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10
Q

What is vascular disease

A

The narrowing of the blood vessels which decreases performance

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11
Q

What is another word for hardening of arteries

A

atherosclerosis

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12
Q

Why do blood vessels narrow

A

Due to deposition of plaques as the body tries to repair damaged vessels

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13
Q

What is cardiac output

A

The volume of blood pumped per minute

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14
Q

What is peripheral resistance

A

The resistance to flow offered by the blood vessels

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15
Q

What blood pressure gives an indication of the strain on vessels when the heart is trying to pump

A

Systolic

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16
Q

What is optimal blood pressure

A

120/80

17
Q

What is normal blood pressure

A

130/85

18
Q

What blood pressure indicates stage 1 hypertension

A

140-159/90-99

19
Q

What happens to SBP during exercise

A

It increases linearly with exertion levels

20
Q

What happens to DPB during exercise

A

it can decrease due to vasodilation

21
Q

What happens to DPB during exercise to individuals suffering from hypertension

A

It increases

22
Q

What can cause a rapid increase in blood pressure

A

Valsalva effect

23
Q

What are the long term effects of exercise on BP

A

Endurance and rhythmic training helps reduce BP over time

Weight training alone does not reduce BP

24
Q

How does endurance training effect the Cardiovascular system

A
Increased stroke volume 
stronger heart 
lower resting heart rate 
increased blood supply to tissue 
Increased oxygen carrying potential