Human Systems Flashcards
(16 cards)
Smooth Muscle
Lining of organs (digestive system, lining of blood vessels, bladder),involuntary, single nucleus, lack striations, weak force of contraction
Cardiac Muscle
Found in the heart, single nucleus, branched, striated, contain intercalated discs
Skeletal Muscle
Found across a joint, used for locomotion,voluntary, muscle fiber, multinucleated, contain straitions
First step of the sliding filament theory
Muscle rests, troponin and tropomyosin surround actin and block myosin heads from binding
Second step of the sliding filament theory
Neuron signals for contraction
Third step of the sliding filament theory
Sarcoplasmic reticulum releases calcium
Fourth step of the sliding filament theory
Calcium binds with troponin causing tropomyosin to leave binding site
Fifth step of the sliding filament theory
Myosin can now bind to binding site and pull in actin
Last step of the sliding filament theory
ATP turns in ADP by breaking bind between myosin ans actin, so it can repeat
Latent period of muscle contraction
Time between the impulse and the contraction (when calcium is released and binds to troponin)
Contraction period of muscle contraction
Actin amd myosin move past eachother
Relaxation period of muscle contraction
Muscle relaxes
Summation period of muscle contraction
Occurs when the nervous system continues to send impulses to the muscle
Tetanus period of muscle contraction
The frequency of the impulse prevents a relaxation period
Muscle type 1
Slow twitch, aerobic cellular respiration, long and lean, endurance, resistant to fatigue
Muscle type 2
Fast twitch, anaerobic cellular respiration, bulk, and rapid fatigue
