WorksheetsHHB 2.6 The Structure & Function of the Heart
Total questions: 23
Worksheet time: 12mins
What is the formula for calculating cardiac output?
CO = HR + SV
CO = HR - SV
CO = HR/SV
CO = HR X SV
Which node sets the rate at which the heart contracts?
Atrioventricular node
Pulmonary node
Sino-atrial node
Ventricular node
What happens during ventricular systole?
The AV valves open and blood flows into the ventricles
Blood returns to the atria
The SL valves close due to higher arterial pressure
The AV valves close and blood is pumped through the SL valves
What is a typical blood pressure reading for a young adult?
140/90 mmHg
100/70 mmHg
110/75 mmHg
120/80 mmHg
What is detected by a pulse when using an inflatable cuff to measure blood pressure?
Diastolic pressure when the blood flows freely
Systolic pressure when the cuff deflates
Diastolic pressure when the cuff inflates
Systolic pressure when the blood starts to flow
atrial systole
atrial and ventricular diastole
ventricular systole
Systole refers to what action?
Relaxing
Contraction
The wave of electrical activity in the sinoatrial node causes the ventricles to contract.
True
False
Where is the SAN found?
(a)
Name Y
right ventricle
AV valve
sinoatrial node
atrioventricular node
What is the function of valve Z?
to prevent the backflow of blood from the right ventricle to the right atrium
to prevent the backflow of blood from the left ventricle to the left atrium
to prevent the backflow of blood from the left atrium to the left ventricle
to prevent the backflow of blood from the right atrium to the right ventricle
Electrical impulses pass from X to Y - what is happening to the heart at this time?
Diastole
Ventricular diastole
Ventricular systole
Atrial systole
During which stage of the cardiac cycle is Z closed?
Diastole
Ventricular diastole
Ventricular systole
Atrial systole
State how long one heart beat lasts in this ECG
0.1s
0.35s
0.5s
0.6s
Calculate the heart rate for this individual.
60bpm
83bpm
120bpm
100bpm
State the stage of the cardiac cycle that lasts longest.
atrial systole
ventricular systole
diastole
Predict how this ECG pattern would change under the influence of the parasympathetic nervous system
speed up
slow down
stay the same
