Term
|
Definition
- Striated Muscle (A bands)
- Smooth Muscle (No A bands)
- Cardiac Muscle
in the muscle cell's cytoplasm there are sarcoplasmic reticulum and transverse tubules) |
|
|
Term
| The Neuromuscular Junction (Step 1 of 3) |
|
Definition
(nerve and a muscle are meeting)
- Muscle fibers only contract when stimulated by a nerve cell
|
|
|
Term
| The Neuromuscular Junction (Step 2 of 3) |
|
Definition
The point at which the nerve cell and muscle fibers meet is called the motor end plate |
|
|
Term
| The Neuromuscular Junction (Step 3 of 3) |
|
Definition
| When the nerve cell is stimulated it releases a chemical from tiny vesicles that stimulates the muscle fiber (these substances are neurotransmitters) |
|
|
Term
|
Definition
| A nerve cell and all the muscle fibers it ineurates or touches. If the number of muscle fibers is small, the movements can be fine. If the number of muscle fibers is large, the movements are larger. |
|
|
Term
| Energy from ATP is used (5) |
|
Definition
- to get Na ions outside a cell
- to get K ions inside a cell
- to move K ions outside a cell
- to move Ca ions back into the sarcoplasmic reticulum
- to change lactic acid into glucose
|
|
|
Term
| How does a muscle contract? (Step 1 of 5) |
|
Definition
| The muscle cell is polarized |
|
|
Term
| How does a muscle contract? (Step 2 of 5) |
|
Definition
| Acetylcholine is released allowing Na ions to enter the cell |
|
|
Term
| How does a muscle contract? (Step 3 of 5) |
|
Definition
| The presence of Na ions causes the sarcoplasmic reticulum to release Ca ions |
|
|
Term
| How does a muscle contract? (Step 4 of 5) |
|
Definition
| The presence of Ca ions causes the actin to slide into the myosin |
|
|
Term
| How does a muscle contract? (Step 5 of 5) |
|
Definition
|
|
