11-19-07 anatomy notes

11-19-07 anatomy notes - 11-19-07 anatomy notes1.Muscular...

Info iconThis preview shows pages 1–2. 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: 11-19-07 anatomy notes1.Muscular Systema.Skeletal System Tonus-few but continual impulses from CNS to muscles in slight state of contractioni.Function-put the muscles in READY STATE1.Muscles are not completely relaxed, contract on demandii.Variations1.Increased-fear, anxiety, severe emotional distress2.Decreased-during sleepb.Muscular Developmenti.Hypertrophy-increased physical size of muscle, increased number of myofibrils/cell NOT increased muscle cells1.Cause-excessive use and exercise of muscle cellsii.Atrophy-decreased physical size of the muscle; decreased number of myofibrils/cell or loss of muscle cells1.Causesa.Immobilization or lack of usei.When you break a bone-put into a cast so muscle isnt used, grows smallerb.Denervation-caused by spinal cord injuries or a loss of motor nerve inputi.Lack of tonusii.In that time, muscle tissue converted to connective tissuec.Origins, Insertions, and Actionsi.Origin-stationary attachment of a muscle1.less movable endii.Insertion-more movable end of a muscle...
View Full Document

This note was uploaded on 04/02/2008 for the course BIOL 20204 taught by Professor Barcellona during the Fall '07 term at TCU.

Page1 / 2

11-19-07 anatomy notes - 11-19-07 anatomy notes1.Muscular...

This preview shows document pages 1 - 2. Sign up to view the full document.

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