Science Starter
1. List the connective tissue coverings of skeletal
muscle, from largest to smallest
2. What are the two main proteins found in the
sarcomere? (hint: one is thin and one is thick)
3. 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
1. What is the first step
in muscle
contraction?
2. What ion is released
into sarcoplasm?
3. What is the difference
between a contracted
and relaxed
sarcomere?
4. What gets “shorter”
during contraction?
Actin Filaments
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