Science Starter List the connective tissue coverings of skeletal muscle, from largest to smallest What are the two main proteins found in the sarcomere?

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Science Starter List the connective tissue coverings of skeletal muscle, from largest to smallest What are the two main proteins found in the sarcomere? (hint: one is thin and one is thick) What is the major neurotransmitter at a neuromuscular junction?

Today’s Agenda Science Starter Internet Investigation Sliding Filament Color Sheet Exit Quiz

Exit Quiz Label the diagram using the following terms: 1. 2. 3. 6. 4. 5.

Internet Investigation **Don’t do #11** With a partner grab a computer and go to my website Mrhoutzscience.weebly.com Use “link 1” and “link 2” to complete the worksheet When you finish the worksheet turn it in to the blue bin and pick up a sliding filament color sheet Color the sheet according to the directions and then place it in your binder

What is the first step in muscle contraction? What ion is released into sarcoplasm? What is the difference between a contracted and relaxed sarcomere? What gets “shorter” during contraction?

Actin Filaments http://blausen.com/?Topic=9075

Exit Quiz Draw the sarcomere structure for a muscle when it is contracted and for a muscle when it is extended (relaxed) Label: actin, myosin, H zone, and Z line