P2musclereapernotes

backle frakle

three types of muscles:


 * cardiac muscle
 * smooth muscle
 * skeletal muscle


 * Skeletal Muscle:** Derek

-attached to the bones of your skeleton -gives the force to move your muscles -at the end of them is a tendon -their cells look banded/striated -responsible for all of our voluntary movements -can be used as heaters, when cold. protein, when malnourished -voluntary/consciously controlled -cell contain more than three nuclei because


 * Smooth Muscle:** Jeff

-on the inside on many internal organs ~ ex. stomach,blood vessels, intestine, and bladder -not striated -involuntary muscles -involved in digestion~ as the muscles in the stomach contract, they make a churning action. the churning helps the food to mix with the chemicals, which digests food -react and tire slower than skeletal muscle -wraped around organ; horizantal layer and vertical layer


 * Cardiac Muscle:** Olivia

-only found in the heart -involuntary -striated -does not get tired -can contract repeatedly; contractions=heartbeats -pumps blood through the body

Muscle movement is caused by contraction and expansion of muscels One side contracts, while other side expands
 * Muscle Movement:**

Using ATP+calcium ions to move cross bridge Cross bridge drages thin filiment made of troponin, tropomyosin, and actin Calcium realesed, ATP used to move cross bridge back into place Repeat, causing contraction
 * Contracting (in depth):**

Thin filiment slides back into original space
 * Expanding (in slightly less in depth):**