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.

Answered by Emily M. Biology tutor

2597 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Describe how the Meselsohn- Stahl experiment was set up. Describe how the results of the Meselsohn- Stahl experiment provide evidence for semi- conservative replication


Briefly describe how the autonomic nervous system returns internal body temperature to normal following a rise in body temperature


Explain the concepts of primary, secondary, tertiary and quaternary


What is the difference between DNA and RNA?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences