What happens when a muscle contracts?

Looking at a diagram of muscle cells you can identify: Z lines, H zone, I band, and A band. The Z lines move closer together, H zone becomes more narrow, as does the I band, and the A band remains the same width. Overall the sarcomere has shortened.

EM
Answered by Emily M. Biology tutor

2697 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

How is an Action Potential produced in a neurone?


What is the difference between vertical and horizontal transmission of antibiotic resistance between bacteria?


What is a nerve synapse and how does it work?


What is the process of mitosis?


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