1. Science Starter What are the 3 types of muscle tissue?
Which is most abundant in our body?
Look at the images to the right, what similarities do you see?

2. Today’s Agenda Science Starter Muscle Tissue Review
Chicken Wing Dissection
Midterm Review Packet
Exit Quiz

3. Amyotrophic Lateral Sclerosis

4. Cell Shape and Appearance Regulation of Contraction
Skeletal Muscle
Body
Location
Mainly attached to the bones
Cell Shape and Appearance
Single, long, multinucleate cells; striated appearance
Regulation of Contraction
Voluntary contractions; sometimes activated by reflexes
Contraction Speed
Ranges from slow to fast based on activity
Rhythmic Contraction
None because voluntarily controlled

5. Cell Shape and Appearance Regulation of Contraction
Cardiac Muscle
Body
Location
Found only in the heart
Cell Shape and Appearance
Branching chains of cells; uninucleate cells; striated appearance
Regulation of Contraction
Involuntary contractions
Contraction Speed
Slow and steady
Rhythmic Contraction
yes

6. Cell Shape and Appearance Regulation of Contraction
Smooth Muscle
Body
Location
Walls of hollow organs (ex: stomach, bladder, respiratory organs)
Cell Shape and Appearance
Single, fusiform shape (tapered at the ends); uninucleate cells; no striations
Regulation of Contraction
Involuntary contractions
Contraction Speed
Very slow
Rhythmic Contraction
Yes in most organs

7. Muscle Tissue Movement Posture Joint stabilization Heat generation
Skeleton: walking, running, etc.
Heart: pumping blood through vessels
Smooth Muscle: fluids, food, other substances throughout the body
Posture
Constantly adjust to keep the body erect
Joint stabilization
Tendons help to stabilize joints as the skeletal muscle allow movement of the body
Heat generation
as ATP is used to help with muscle contractions, the energy is given off as heat; helps to maintain body temperature

8. Chicken Wing Dissection
You will be graded on 2 things:
Lab sheet (80%)
Success of Dissection (20%)
Make sure you follow all directions and complete the lab within today’s class time
Be careful and clean up when you are done!

9. Chicken Wing Dissection

10. Chicken Wing Dissection
READ through the first page to understand why we are using a chicken wing
OBTAIN all the materials that you will need to complete the dissection
WRITE observations on your lab sheet
ANSWER all questions in the analysis and conclusion

11. Midterm Review Packet
The midterm will be on each of the objectives in the packet!
The number of items for an objective in the packet is a great indicator of it’s importance on the midterm
Complete the packet over the next 2 days, it will be due before you take the midterm (complete or not, it is the last day of the quarter!)