anatomy 23 - 25.17 What makes muscles work? The nervous...

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

View Full Document Right Arrow Icon
o 25.17 What makes muscles work? The nervous system Respiratory rhythmicity center Has two components (don’t worry about names) o One is for inspiration (inspiratory center) o One is for expiration (expiratory center) Regulates the rhythm of your breathing Apneustic center In the pons Important in changing the rhythm of inspiration Penumotaxic center Inhibits the apneustic center Chemoreceptors that measure blood chemistry in respiratory they measure blood CO2 levels if the CO2 level is above a certain setpoint, (determined by your genetics) you need to get more oxygen, and get rid of CO2 o so when you need to take a breath is dictated by the amount of CO2 in the blood during respiratory rest, all live cells in your body are producing CO2 o they send impulses to the inhalation center or division of the rhythmicity center- which then sends impulses to the diaphragm and to the external intercostals, and those muscles contract o what determines how much air you suck in? in relaxed breathing:
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.

This note was uploaded on 03/18/2009 for the course BS 240 taught by Professor Zink during the Spring '09 term at University of the Sciences in Philadelphia.

Page1 / 2

anatomy 23 - 25.17 What makes muscles work? The nervous...

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