Quiz 5 - Skeletal Muscle Structure Flashcards Preview

Anatomy > Quiz 5 - Skeletal Muscle Structure > Flashcards

Flashcards in Quiz 5 - Skeletal Muscle Structure Deck (11):
1

Connective tissue

- epimysium
- perimysium
- endomysium

2

epimysium

surrounds entire muscle

3

perimysium

surrounds group of muscle fibers
- fascicles = bundles of muscle fibers

4

endomysium

surrounds individual muscle fibers

5

muscle fiber

- sarcolemma
- sarcoplasmic reticulum (SR)
- T-tubules
- myofibrils

6

sarcolemma

plasma membrane surrounding each muscle fiber

7

sarcoplasmic reticulum (SR)

membranous sacs surrounding each myofibril, containing calcium (calcium starts the contraction - the gas for muscles)

8

T-tubules

transverse tubules: transmit electrical activity through cell, allow coordinated muscle contraction

9

myofibrils

individual cylinder bundle compose of thin and thick filaments, structures responsible for muscle fiber contraction

10

thick filaments

myosin - contractile bundles of myosin molecules

11

thin filament

actin - 2 strands of actin chains wrapped around each other