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Lab Exam 3 Notecards
Muscle Physiology, Endocrine, Blood, Heart, Circulatory System
4
Anatomy
Undergraduate 2
04/14/2010
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Cards

Term
1. Motor Unit
2. Relationship between motor unit size and percision
3. Relationship between motor units and muscle tone
4. Neuromuscular Junctions
 Definition
1. One motor neuron and all muscle fibers connecting
1. Range 10-2000

2. Smaller unit = precision movements
2. Larger unit = gross movements

3. More activated motor units = more tone

4. Where motor neuron connects to muscle fiber
Term

Muscle Twitch

1. Latent Period

2. Contraction

3. Relaxation

 Definition

1. Time between stimulus and muscle contraction

 

2. Shortening of muscle fiber

 

3. AChE deactivates ACh--Ca+ ions back to sarcoplasmic reticulum
Term

Muscle Tension-Relationship with...

1. Frequency of Stimulation

2. Number of Motor Neurons

3. Degree of Muscle Stretch

 Definition

1. Increased stimulus = increased tension

 

2.

 

3.
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