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Anatomy > Muscle Anatomy > Flashcards

Muscle Anatomy Flashcards

1
Q

How Much Body Weight consists of muscle?

A

40%

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2
Q

How much of muscle is water?

What does the solid matter of muscle consist of?

A

80% Water

The solid matter consists of mostly protein.

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3
Q

Name and describe the 3 types of muscles

A
  1. Smooth - involuntary, visceral
  2. Skeletal - voluntary, striated
  3. Cardiac - heart-related
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4
Q

What 4 parts are essential to each muscle?

A
  1. Artery
  2. Vein
  3. Nerve
  4. Tendon
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5
Q

The Golgi Tendon is sensitive to ___.

A

Tension

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6
Q

Muscle Spindles are sensitive to ______.

A

Muscle Length

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7
Q

Name the parts of the muscle:

A
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8
Q

Name and describe the 2 parts of a myofilament:

A
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9
Q

What type of “unit” is Sarcomere considered?

A

Contractile unit

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10
Q

What are the 3 types of muscles?

A
  1. **Parallel **
  2. Radiating (fan-shaped)
  3. Pennate (feather-shaped)
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11
Q

Which muscle type has a longer range of motion?

A

Parallel

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12
Q

Which muscle type can exert the most force?

A

Radiating

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13
Q

Identify which Lever Class:

Is it mechanically advantageous, or disadvantageous?

A

Class 1

Mechanical advantage/ disadvantage depends on position of fulcrum or Applied Force/Resistive Force.

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14
Q

Identify which Lever Class:

Is it mechanically advantageous, or disadvantageous?

A

Class 2

Mechanically advantageous

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15
Q

Identify which Lever Class:

Is it mechanically advantageous, or disadvantageous?

A

Class 3

Mechanically disadvantageous

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16
Q

Which of the lever classes is most common in the body?

A

Class 3

17
Q

Which of the lever classes is least common in the body?

A

Class 2

18
Q

Do muscles pull or push?

A

Always pull

19
Q

What is a Single Motor Unit (SMU)?

A

A single motor neuron,

plus all of the muscle fibers that it innervates.

20
Q

What are the 2 major methods of increasing tension in a muscle?

A
  1. Increasing firing rate
  2. **Causing more motor units to fire **
21
Q

Name Innervation Ratios for:

  1. Eye
  2. Limb
  3. Hand
  4. Larynx
A
  1. Eye: 5-10/1
  2. Limb: 500-2000/1
  3. Hand: 10-50/1
  4. Larynx: 200/1

Anatomy (3 decks)

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