M2 L1 Flashcards
1
Q
List the functions of muscle cells then group them as striated, smooth, voluntary, and involuntary. also skeletal cardiac, and smooth muscle cells
A
2
Q
what are the 2 general functions of muscles cells
A
- store chemical energy
- covert chemical energy into mechanical energy
3
Q
what is isovolumetric contraction
A
volume doesn’t change with contraction
4
Q
when you cut the muscle belly in half and look in it, what components do you find?
A
- epimysium: connective tissue on the surface that ensheath muscle
- perimysiom: connective tissue in the muscle that surrounds individual muscle fascicles (fiber bundles)
- muscle fibers: long cylinders coming out of muscle. theyre individual multinuceluated cells and are 50 microm diameter.
5
Q
if you take one muscle fiber and cut it in half, what do you find inside?
A
you have the cell membrane that contains myofibrils which are single organelles inside of muscle fibers.
6
Q
If you cut through a single myofibril, what do you see?
A
it is made up of z discs that divide the myofibril into compartments. Space between them is 2.1 micrometer
7
Q
A
