HLSC 2F95 Lecture Notes - Lecture 3: Acetylcholine, Atp Hydrolysis, Neuromuscular Junction

• School: Brock University
• Department: Health Sciences
• Course: HLSC 2F95
• Professor: Rebecca Mcpherson

Document Summary

Basic properties of muscle: excitability, respond to stimuli, contractibility, shorten and exert a pull or tension, extensibility, contract over a range of resting lengths, elasticity, rebound toward original length. Cardiac muscle (striated involuntary muscle: only associated with the heart, cells are short, branched and striated, one nucleus, cells connected by intercalated discs, pulsating/rhythmic contractions, cannot regenerate. Smooth muscle (nonstriated involuntary muscle: cells are short, spindle-shaped, nonstriated, one central nucleus, can divide and regenerate, base of hair follicles, walls of blood cells, lining the urinary bladder, circulatory, digestive and reproductive tracts. Incapable of cell reproduction: myosatellite cells can reproduce for muscle repair, cells are long, cylindrical, striated, and multinucleated, voluntarily moves the skeleton. Functions of skeletal muscle: movement, posture and body position, support soft tissue, regulate entering and exit of certain materials, maintain body temperature. Gross anatomy of skeletal muscle: connective tissue, muscle.