Name That Protein
This thick filament is the primary motor protein of muscle contraction
What is Myosin?
Another name for the attachment of myosin to actin
What is a cross-bridge?
This type of filament is represented by the purple structure (_____ filament)
What is the thick filament?
This protein makes up the thin filament and contains the binding sites used during cross-bridge cycling
What is Actin?
This molecule must bind to myosin for it to detach from actin
What is ATP?
This complex on the diagram
What is the cross-bridge?
Calcium binds to this regulatory protein on the thin filament
What is Troponin?
Calcium binds to troponin, which causes a conformational change, moves tropomyosin away, and exposes this important region.
What are the binding sites?
These green balls represent this important protein
What is Actin?
This protein blocks the myosin-binding sites on actin when the muscle is relaxed
What is tropomyosin?
During this phase of contraction, stored energy in the myosin head is used to generate filament movement
What is the Power Stroke?
This part of a protein is represented by this structure
What is the myosin head?
This enzyme breaks down acetylcholine in the synaptic cleft after it transmits the signal
What is acetylcholinesterase?
During contraction, thin filaments are pulled towards this central region of the sarcomere
What is the M line?
It represents these gray dots
What is calcium?