Muscle Quiz

Question 1

Reasons for names (6)

Answer 1

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

Question 2

Characteristics of skeletal muscle tissue (12)

Answer 2

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

Question 3

Tonic

Answer 3

Continual partial contraction (posture)

Question 4

Isotonic

Answer 4

Muscle shortens but it’s tension increases; produces movement

Question 5

Isometric

Answer 5

Muscle length stays the same with increasing tension; movement

Question 6

Twitch

Answer 6

Quick, jerky contraction in response to single stimulus; rare

Question 7

Tetanic

Answer 7

Sustained smooth contraction produced by a series of stimuli

Question 8

Treppe

Answer 8

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

Question 9

Fibrillation

Answer 9

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

Question 10

Convulsion

Answer 10

Uncoordinated tetanic contractions of varying groups of muscles

Question 11

General functions (3)

Answer 11

Movement
Posture
Heat production

Question 12

Examples of muscles named for their direction of fibers

Answer 12

• transversus abdominis

- rectus femoris

Question 13

Examples of muscles named for their location

Answer 13

• tibialis anterior

- frontalis

Question 14

Examples of muscles named for their points of attatchment

Answer 14

-sternocleidomastoid

Question 15

Examples of muscles named for its number of divisions

Answer 15

• Bicep

- tricep