13b. Cardiovascular function

Question 1

What triggers atrial contraction

Answer 1

SA node

Question 2

What is occuring in the heart during atrial systole?

Answer 2

Atria contracting
AV valves are open
Blood being pumped to ventricles

Question 3

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

Answer 3

Atrial diastole

Question 4

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

Answer 4

atrial systole

Question 5

What does the AV node do?

Answer 5

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

Question 6

What is cardiac output (Q/CO)?

Answer 6

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

Question 7

What do the Purkinje Fibres do?

Answer 7

Cause ventricular contraction

Question 8

What is the number of times the heart beats per min

Answer 8

Heart rate (HR)

Question 9

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

Answer 9

Stroke volume (SV)

Question 10

What is stroke volume (SV)?

Answer 10

The amount of blood pumped out of the heart per beat

Question 11

What is meant by systole?

Answer 11

Pressure exerted on the blood vessels during contraction

Question 12

What is the pressure exerted on the blood vessels during contraction

Answer 12

systole

Question 13

What is heart rate (HR)?

Answer 13

The number of times the heart beats per min

Question 14

What transmits electrical signals from the AV node to thebundle branches

Answer 14

Bundle of HIS

Question 15

What causes ventricular contraction?

Answer 15

Purkinje Fibres

Question 16

What does the Bundle of HIS do?

Answer 16

transmits electrical signals from the AV node to thebundle branches

Question 17

What is occuring in the heart during atrial diastole?

Answer 17

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

Question 18

What does the SA node do?

Answer 18

Triggers atrial contraction

Question 19

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

Answer 19

AV node

Question 20

What is the order of the cardiac conduction system?

Answer 20

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

Question 21

What is pressure exerted on the blood vessels during relaxtion

Answer 21

diastole

Question 22

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

Answer 22

Cardiac output (Q/CO)

Question 23

What is diastole?

Answer 23

the pressure exerted on the blood vessels during relaxtion

Question 24

What is occuring in the heart during ventricular systole?

Answer 24

Ventricles contracting
semilunar valves open
blood leaving heart into arteries

Question 25

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

Answer 25

ventricular systole

Question 26

What is occuring in the heart during ventricular diastole?

Answer 26

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

Question 27

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

Answer 27

systolic

Question 28

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

Answer 28

diastolic

Question 29

What is hypertension?

Answer 29

high blood pressure

Question 30

What is hypotension?

Answer 30

low blood pressure

Question 31

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

Answer 31

Vasodilation

Question 32

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

Answer 32

Vasoconstriction

Question 33

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

Answer 33

decreases

Question 34

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

Answer 34

increases

Question 35

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

Answer 35

increasing

Question 36

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

Answer 36

increase/stimulated

Question 37

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

Answer 37

decreasing

Question 38

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

Answer 38

decrease/inhibited

Question 39

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

Answer 39

increased BP (hypertension) and results in lowered BP

Question 40

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

Answer 40

decreased BP (hypotension) and results in increased BP