MuscleTissue

MuscleTissue - Muscle Tissue • Alternating contraction and relaxation of cells • Chemical energy changed into mechanical energy 3 Types •

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Muscle Tissue • Alternating contraction and relaxation of cells • Chemical energy changed into mechanical energy 3 Types • Skeletal • Attaches to bone, skin, and fascia • Banded • Voluntary • Cardiac • Autorhythmic control- involuntary • Smooth • Nonstriated • Attached to hair follicles, organs • Involuntary Functions of Muscle tissue • Producing body movements • Stabilizing body positions • Regulating organ volumes • Movement of substances within the body • Producing heat Properties of Muscle Tissue • Excitability- ability to propagate • Conductivity- send • Contractility- ability to contract • Extensibility- ability to stretch • Tensile strength- collagen fibers • Elasticity- ability to regain original strength Skeletal Muscle- CT • Superficial fascia- loose CT and fat underlying the skin • Deep fascia- dense CT • Epimysium- whole muscle fiber • Perimysium- surrounds fascicle- bundle of 100 muscle fibers • Endomysium • Myocyte or myofiber- single muscle cell Nerve and blood supply • Each skeletal muscle is supplied by a nerve, artery and 2 veins • Each motor neuron supplies multiple cells (NMJ) • Each muscle cell is supplied by one motor neuron terminal branch and is in contact with Structures of NMJ region • Synaptic end bulbs are swellings of axon terminals • End bulbs contain synaptic vesicles filled with ACh • Motor end plate membrane contains 30 million ACh receptors Atrophy and Hypertrophy • Atrophy • Wasting away of muscles • Caused by disuse (disuse atrophy) or severing of the nerve supply (denervation) • Hypertrophy • Increase in the diameter of muscle fiber • Resulting in an increase in myofibrils, SR, and mitochondria OLD NOTES Functions of Muscle Tissue • Produce movement • Stabilize body position...
View Full Document

This note was uploaded on 04/07/2008 for the course KIN 2500 taught by Professor Hargroder during the Spring '08 term at LSU.

Page1 / 5

MuscleTissue - Muscle Tissue • Alternating contraction and relaxation of cells • Chemical energy changed into mechanical energy 3 Types •

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online