Week 4 – Joints and Muscle Tissue

Question 1

What are muscle tissues/ muscle cells made up of?

Answer 1

• fascicles combine to make up muscles
• muscle fibres combine to form fascicles
• the organelle that is the contractile element of a muscle is myofibril within which are sarcomeres

Question 2

What is the sliding filament model?

Answer 2

myosin (thick filamenst) binds to actin (thin filaments) forming cross bridges - contracting the muscle, shortening the I band and the distance b/w Z discs
ATP and Calcium play a part