How Muscles Contract
Grade 11th Grade · Science · 45 min
What's Included
Learning Objective
I can describe the steps involved in muscle contraction.
Warm-Up Video
Alila Medical Media · 2:49
Muscle Contraction - Cross Bridge Cycle, Animation.
Guided Notes
3 key concepts
- 1
Muscle contraction occurs when actin and myosin filaments slide past each other, shortening the sarcomere.
- 2
Muscle contraction begins when a nerve impulse stimulates muscle fibers, releasing calcium ions which bind to troponin.
- 3
The binding of ATP severs the bonds between myosin and actin, and the energy released is stored in the myosin heads.
Practice Questions
11 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“Describe the steps involved in muscle contraction, starting from the nerve impulse and calcium ion release to the start of a new actin binding sequence.”
Complete Lesson Package
Get all 3 ready-to-use resources:
