Anatomy Ch 10

700 skeletal muscles, they form the muscular system

Their potentially extraordinary strength, referred to as muscle fibers

Excitability, Contractility, Elasticity, Extensibility

(unique property of muscle tissue)equated with responsiveness, muscle cells responsive to input from stimuli, when a muscle cell is stimulated by nervous system, stretching, or other stimuli in enviroment, it responds by initiating electrical changes leading to muscle contraction

(unique property of muscle tissue) Stimulation of muscle cells generates tension w/in the cell (contraction), may cause cell to shorten. Shortening results in pull on bones of skeleton or movement of specific body parts

(unique property of muscle tissue) not ability to stretch but, muslce's ability to return to its original length when tension is released

(unique property of muscle tissue) Muscle cell must be capable of extending in length in response to contraction of opposing muscle fibers

Is an organ b/c they are composed of the 4 types of tisue: epithelial, connective, muscle, and nervous

Striated, usually attached to one or more bones

Body movement, maintenance of posture, temperature regulation, storage and movement of materials, support

(function of skeletal muscle)Bone of skeleton move when muscles contract &pull on tendons by which muscles are attached to bones. muscles, bones, &joints can produce highly coordinated movements: running&simple localized movements:underlining a word in a book

(function of skeletal muscle) contraction of specific skeletal muscles stabilizes joints &helps maintain body's posture/position. postural muscles contract continuously when a person is awake to prevent collapse

(function of skeletal muscle) energy required for muscle tissue contraction, &heat always produced as waste product of this energy usage. most of this heat maintains our normal body temperature

(under temp. regulation) the heat felt is produced by working muscles, you shiver b/c muscles are contracting and relaxing to produce heat

(function of skeletal muscle) Sphincters (circular muscle bands) contract at openings or orficies, of the gastrointestinal &urinary tracts. Sphincters maybe voluntarily closed (store material w/in oran) or opened(facilitate movements of materials)