Muscular+System+JO

Muscular System Chapter 12 pp 227-236 (New Unit called Move it)

smooth: found in walls of hollow internal organs and causes walls to contract. does not fatigue easily cardiac: forms heart wall, fibers interlock. involuntary rhythmic contractions skeletal: longer muscles that extend the length of bones... we chose to move them
 * 1. What are the three types of muscles in the body and what is the function of each?**

One contracts while the other relaxes.
 * 2. How do skeletal muscles work together to cause the bones to move?**

You will need to know the location and function of the following (write the function next to the name -- see page 231) Pectoralis major Deltoid trapezius biceps brachii triceps brachii External oblique latissimus dorsi gluteus maximus quardriceps femoris gastrocnemius**
 * 3. Insert an image of the major muscles in the body like the one on page 231.

myofibrils sarcomeres myosin actin
 * 4. Define**


 * 5. Describe the structure of a sarcomere's thick and thin filaments.**


 * 6. Describe the sliding filament model and insert image (How does the sarcomere contract?)**