BILD2Handout2b

BILD2Handout2b - Theresa Tran ttt030@ucsd.edu OH Thursdays...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Theresa Tran ttt030@ucsd.edu OH Thursdays PC Theater 10-11am BILD2 Berg WI11 Handout #2b Muscle Physiology (remember to look at the plots/graphs he drew in class) : a single stimulus of motor nerve that leads to a brief contraction increase stimulus increase recruitment of increase # of muscle fibers contracting “MOTOR UNIT”= # of muscle fibers innervated by the same motor neuron (one axon branches to NMJs) Tetanus: Maximal contraction caused by rapid and repeated stimulation Tetanus Strength > Maximal twitch because Ca++ piles up between higher [Ca++] inside contraction strength (Contraction strength is proportional to Ca++, to amount of troponin moving the trypomyosin, that relates to number of myosin heads forming and “ratcheting”) Action Potential and Contraction of the Cardiac Muscle 1. ~little SR; most Ca++ comes from _______________________ 2. Long APs with lots of (VGCCs) Ca++ influx The Vm hits a plateau so that the heart has time to pump CARDIAC AP
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

BILD2Handout2b - Theresa Tran ttt030@ucsd.edu OH Thursdays...

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