anatomy prequiz 8

epimysium

layer of dense connective tissue that surrounds entire muscle; aka deep fascia

perimysium

extensions of epimysium that divide the muscle into bundles of muscle cells called fascicles

endomysium

extension pf perimysium that penetrates each fascicle and surrounds each individual muscle cell

sarcolemma

plasma membrane surrounding the muscle cell

sarcoplasm

cytoplasm of a muscle cell

nuclei

skeletal muscle cells are multi-nucleate; nuclei typically lie close to sarcolemma and appear like bumps

striations

dark and light stripes in each muscle cell

mechanisms of muscle contraction

conduction of impulse along motor neuron, the neuromuscular junction, excitation of muscle cell, excitation-contraction coupling, mechanism of contraction

input device

Recording electrodes or input transducers may serve as an input device that picks up the biological event. recording electrode- event in electrical; input transducer- event is non-electrical

recording electrode

nerve impulse

input transducer

muscle contraction

interface unit

device that receives signals from electrodes or transducers, amplifies the magnitude of the signal, fowards the info to the computer

computer display

magnified signals from the interface unit are logged to data file and converted into graphic recording

MP35

refers to particular model of interface that is part of the BIOPAC, Inc. DAS

channel

composed of the input unit (recording electrodes or transducer), the intersurface unit (MP35), and computer monitors display

delta T

seconds

p-p

mVolts