Biological Measurement (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does an electrocardiograph (ECG) display?
What does an electrocardiograph (ECG) display?
Heart's electrical activity over time
What type of electrodes are standard for ECG measurements?
What type of electrodes are standard for ECG measurements?
Silver electrodes coated with silver chloride
What is the typical amplitude of ECG signals at the skin surface?
What is the typical amplitude of ECG signals at the skin surface?
Approximately mV
What frequency of electromagnetic interference comes from mains-operated equipment?
What frequency of electromagnetic interference comes from mains-operated equipment?
Hz
How long does one complete cardiac cycle typically last?
How long does one complete cardiac cycle typically last?
Approximately seconds
What does the P wave represent?
What does the P wave represent?
Depolarisation of atrial muscle cells
What does the QRS complex represent?
What does the QRS complex represent?
Depolarisation of ventricular muscle cells
What does the T wave represent?
What does the T wave represent?
Repolarisation of ventricular muscle cells
Why is the QRS complex the largest feature on the ECG trace?
Why is the QRS complex the largest feature on the ECG trace?
It reflects the large ventricular muscle mass
If QRS complexes are separated by s, what is the pulse rate?
If QRS complexes are separated by s, what is the pulse rate?
beats per minute