Muscle Quiz Flashcards Preview

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Flashcards in Muscle Quiz Deck (15)
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1
Q

Reasons for names (6)

A
Its action
Direction of fibers
Its location
Number of divisions
Its shape, size 
Its points of attachment
2
Q

Characteristics of skeletal muscle tissue (12)

A
  1. Voluntary
  2. Cells are called fibers
  3. Fibers arranged in bundles called fascicles
  4. Striated
  5. Attached to bones via tendons
  6. Supply the strongest contractions
  7. Mostly protein composed of filaments
  8. Many nuclei per fiber
  9. Many mitochondria per fiber
  10. Will fatigue
  11. All or nothing law
  12. Graded response during contraction
3
Q

Tonic

A

Continual partial contraction (posture)

4
Q

Isotonic

A

Muscle shortens but it’s tension increases; produces movement

5
Q

Isometric

A

Muscle length stays the same with increasing tension; movement

6
Q

Twitch

A

Quick, jerky contraction in response to single stimulus; rare

7
Q

Tetanic

A

Sustained smooth contraction produced by a series of stimuli

8
Q

Treppe

A

Staircase phenomenon; muscles contract more forcefully after they have contracted a few times

9
Q

Fibrillation

A

Abnormal contraction where different muscle fibers contract at different times causing a flutter

10
Q

Convulsion

A

Uncoordinated tetanic contractions of varying groups of muscles

11
Q

General functions (3)

A

Movement
Posture
Heat production

12
Q

Examples of muscles named for their direction of fibers

A
  • transversus abdominis

- rectus femoris

13
Q

Examples of muscles named for their location

A
  • tibialis anterior

- frontalis

14
Q

Examples of muscles named for their points of attatchment

A

-sternocleidomastoid

15
Q

Examples of muscles named for its number of divisions

A
  • Bicep

- tricep