Muscle Anatomy Flashcards
How Much Body Weight consists of muscle?
40%
How much of muscle is water?
What does the solid matter of muscle consist of?
80% Water
The solid matter consists of mostly protein.
Name and describe the 3 types of muscles
- Smooth - involuntary, visceral
- Skeletal - voluntary, striated
- Cardiac - heart-related
What 4 parts are essential to each muscle?
- Artery
- Vein
- Nerve
- Tendon
The Golgi Tendon is sensitive to ___.
Tension
Muscle Spindles are sensitive to ______.
Muscle Length
Name the parts of the muscle:
Name and describe the 2 parts of a myofilament:
What type of “unit” is Sarcomere considered?
Contractile unit
What are the 3 types of muscles?
- **Parallel **
- Radiating (fan-shaped)
- Pennate (feather-shaped)
Which muscle type has a longer range of motion?
Parallel
Which muscle type can exert the most force?
Radiating
Identify which Lever Class:
Is it mechanically advantageous, or disadvantageous?
Class 1
Mechanical advantage/ disadvantage depends on position of fulcrum or Applied Force/Resistive Force.
Identify which Lever Class:
Is it mechanically advantageous, or disadvantageous?
Class 2
Mechanically advantageous
Identify which Lever Class:
Is it mechanically advantageous, or disadvantageous?
Class 3
Mechanically disadvantageous
Which of the lever classes is most common in the body?
Class 3
Which of the lever classes is least common in the body?
Class 2
Do muscles pull or push?
Always pull
What is a Single Motor Unit (SMU)?
A single motor neuron,
plus all of the muscle fibers that it innervates.
What are the 2 major methods of increasing tension in a muscle?
- Increasing firing rate
- **Causing more motor units to fire **
Name Innervation Ratios for:
- Eye
- Limb
- Hand
- Larynx
- Eye: 5-10/1
- Limb: 500-2000/1
- Hand: 10-50/1
- Larynx: 200/1
