Describe what each point of an ECG represents.

P wave: atrial depolarisation and subsequent contraction. QRS complex: Ventricular depolarisation and subsequent contraction. Q wave is negative due to left to right depolarisation of ventricular septum. Atrial repolarisation occurs here but electrical activity is masked by QRS complex. ST segment: ventricular repolarisation.

HC
Answered by Humza C. Biology tutor

6575 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Explain, in terms of the movement of ions, the shape of a typical action potential.


The genetic code is described as being degenerate. What does this mean? and why ?


Define antibodies and antigens, and describe the different ways in which the body develops immunity.


How do expiration and inspiration occur by the action of the lungs?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences