Exam 3- muscle... Flashcards Preview

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Flashcards in Exam 3- muscle... Deck (10):
1

Relaxation

Immediately after Ca++ is released, the SR begins actively pumping it back into the sacs
Ca++ is removed from the troponin molecules, stopping the contraction

2

Rid fiber muscles

have more myoglobin
slower acting
more stamina
ex: postural muscles

3

White fiber muscles

Have less myogloben
faster acting (darting motions)
less stamina
fingers, eyes

4

Fascia

regular dense collagenous fibrous connective tissue
continuous with the periosteum, tendons and ligaments.
covers the muscle organs

5

Fascicle

Group or cord of muscle fibers

6

Epimysium

tough outer layer of connective tissue

7

perimysium

middle layer of connective tissue
binds and connects individual fascicles

8

Motor unit

Motor neuron plus the muscle fibers to which it attaches

9

Twitch Contraction

Phases:
Latent Phase
Contraction Phase
Relaxation phase

10

Tetanus

Smooth, sustained contraction.
Multiple wave summation