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Yr 12 VET Health > 13b. Cardiovascular function > Flashcards

13b. Cardiovascular function Flashcards

1
Q

What triggers atrial contraction

A

SA node

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2
Q

What is occuring in the heart during atrial systole?

A

Atria contracting
AV valves are open
Blood being pumped to ventricles

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3
Q

What part of the cardiac cycle involves
All heart mucle in relaxation
All valves closed
Blood returning to atria

A

Atrial diastole

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4
Q

What part of the cardiac cycle involves
Atria contracting
AV valves are open
Blood being pumped to ventricles

A

atrial systole

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5
Q

What does the AV node do?

A

Conducts electrical impulses from the atrium to the ventricles, controlling heart rate

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6
Q

What is cardiac output (Q/CO)?

A

the amount of blood pumped out the heart per minute (L/min)

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7
Q

What do the Purkinje Fibres do?

A

Cause ventricular contraction

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8
Q

What is the number of times the heart beats per min

A

Heart rate (HR)

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9
Q

What is the amount of blood pumped out of the heart per beat

A

Stroke volume (SV)

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10
Q

What is stroke volume (SV)?

A

The amount of blood pumped out of the heart per beat

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11
Q

What is meant by systole?

A

Pressure exerted on the blood vessels during contraction

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12
Q

What is the pressure exerted on the blood vessels during contraction

A

systole

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13
Q

What is heart rate (HR)?

A

The number of times the heart beats per min

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14
Q

What transmits electrical signals from the AV node to thebundle branches

A

Bundle of HIS

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15
Q

What causes ventricular contraction?

A

Purkinje Fibres

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16
Q

What does the Bundle of HIS do?

A

transmits electrical signals from the AV node to thebundle branches

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17
Q

What is occuring in the heart during atrial diastole?

A

All heart mucle in relaxation
All valves closed
Blood returning to atria

18
Q

What does the SA node do?

A

Triggers atrial contraction

19
Q

What conducts electrical impulses from the atrium to the ventricles, controlling heart rate?

A

AV node

20
Q

What is the order of the cardiac conduction system?

A

SA node - AV node - Bundle of HIS - Purkinje Fibres

21
Q

What is pressure exerted on the blood vessels during relaxtion

A

diastole

22
Q

What is the amount of blood pumped out the heart per minute (L/min)

A

Cardiac output (Q/CO)

23
Q

What is diastole?

A

the pressure exerted on the blood vessels during relaxtion

24
Q

What is occuring in the heart during ventricular systole?

A

Ventricles contracting
semilunar valves open
blood leaving heart into arteries

25
Q

What part of the cardiac cycle involves ventricles contracting
semilunar valves open
blood leaving heart into arteries

A

ventricular systole

26
Q

What is occuring in the heart during ventricular diastole?

A

Heart muscle in relaxation
All valves closed
Blood returning to the atria

27
Q

What is the higher measure and numerator of a BP reading called?

A

systolic

28
Q

What is the lower measure and denominator of a BP reading called?

A

diastolic

29
Q

What is hypertension?

A

high blood pressure

30
Q

What is hypotension?

A

low blood pressure

31
Q

When blood pressure is too high what happens to the blood vessles to maintain homeostasis?

A

Vasodilation

32
Q

When blood pressure is too low what happens to the blood vessles to maintain homeostasis?

A

Vasoconstriction

33
Q

When blood pressure is too high what happens to HR to maintain homeostasis?

A

decreases

34
Q

When blood pressure is too low what happens to HR to maintain homeostasis?

A

increases

35
Q

Increased HR and vasoconstriction will impact BP by increasing/decreasing it?

A

increasing

36
Q

If blood pressure is high baroreceptors will increase (stimulated) /decrease (inhibited) firing rate

A

increase/stimulated

37
Q

Decreased HR and vasodilation will impact BP by increasing/decreasing it?

A

decreasing

38
Q

If blood pressure is low baroreceptors will increase (stimulated) /decrease (inhibited) firing rate

A

decrease/inhibited

39
Q

Increased firing rate (stimulation) of baroreceptors occurs as a result of and results in?

A

increased BP (hypertension) and results in lowered BP

40
Q

Decreased firing rate (inhibited) of baroreceptors occurs as a result of and results in?

A

decreased BP (hypotension) and results in increased BP

Yr 12 VET Health (37 decks)

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