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Muscle Physiology 1
Mr. Sullivan : Trimester 2
11
Anatomy
11th Grade
12/12/2013

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Cards

Term
Types of Muscle Tissue
Definition
  1. Striated Muscle (A bands)
  2. Smooth Muscle (No A bands)
  3. 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)

  1. 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
Motor Unit
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
  1. to get Na ions outside a cell
  2. to get K ions inside a cell
  3. to move K ions outside a cell
  4. to move Ca ions back into the sarcoplasmic reticulum
  5. 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
This shortens the cell
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