Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Muscle tissue.
skeletal tissue and fibers
| Question | Answer |
|---|---|
| what are three types of muscle tissue? | skeletal, smooth, and cardiac |
| skeletal muscle | voluntary with stripes, ex. bone |
| smooth muscle | involuntary without stripes, ex. walls of hallow organs |
| cardiac muscle | involuntary with stripes, ex. heart |
| what are the function of muscle tissue? | movement, maintenance of posture, joint stabilization, and heat generation |
| what are the three functional features? | contractility, excitability, extensibility, and elasticity |
| contractility | muscles cells shorten and generate pulling force |
| excitability | electrical nerve impulse stimulate the muscle cell to contract |
| elasticity | can recoil passively after being stretched, resume resting length |
| sarcolemma | plasma membrane |
| cytoplasm | sarcroplasm |
| what are the three connective tissue binds with skeletal muscles and its fiber together? | epimysium, perimysium, and endomysium |
| epimysium | dense regular connective tissue surrounding entire muscle |
| perimysium | surrounds each fascicle (groups of muscle fibers) |
| endomysium | a fine sheath of connective tissue wrapping each muscle fiber |
| each skeletal muscle supplied by branches of... | one nerve, one artery, and one or more veins |
| origin | less movable attachment |
| insertion | more movable attachment |
| fleshy attachments | connective tissue fibers are short |
| indirect attachments | connective tissue forms a tendon or aponeurosis (flat tendon) |
| sarcromeres | a long row of repeating segments, ex. Z disc (Z line), thin (actin) filaments, and thick (myosin) fliaments |
| Z disc (Z line) | boundaries of each sarcromere, where the cell membrane connect each other |
| thin (actin) filament | extend from Z disc toward the center of the sarcromere |
| thick (myosin) filament | located in the center of the sarcromere |
| A bands | full length of the thick filament, includes inner end of thin filament |
| H zone | center part of A band where no thin filament occur |
| M line | in center of H zone, contain tiny rod that hold thick filaments together |
| I band | region with only thin filament, lies within two adjacent sarcromeres |
| what are the three types of skeletal muscle fibers? | slow oxidative fibers (Type I), fast glycolytic fiber (Type IIx), and fast oxidative fibers (Type IIa) |
| slow oxidative fibers (Type I) | red color due to abundant mygobbin obtain energy from aerobic metabolic reactions contain a large number of mitochondria richly supplied with cappilaries contract slowly and resistant to fatigue fibers are smaller in diameter |
| fast glycolytic fiber (Type IIx) | contain little myoglobin and few mitochondria about twice the diameter of slow-oxidative fiber contain more myofilaments and generate more power depend on anaerobic pathways contract rapidly and tire quickly |
| fast oxidative fibers (Type IIa) | have a an intermediate diameter contract quickly like fast glycolytic fibers are oxygen-dependent have high myogglobin content and rich supply of capillaries somewhat fatigue-resistant more powerful than slow-oxidative fibers |
Created by:
adriana9
Popular Anatomy sets