08-30-10 - Ionic Basis of Resting Membrane Electrical...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Ionic Basis of Resting Membrane Electrical Potential BioS 286 John Leonard ([email protected])
Background image of page 1

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

View Full DocumentRight Arrow Icon
See Blackboard Web site o Neuroscience, Exploring the Brain 3 rd Edition o Please Read Chapters 3 and 4 for the lectures on Resting and Action Potentials this week.
Background image of page 2
Q? : How do nerve and muscle cells always have a voltage across their surfaces? Answer: Same way all cells do, ionic gradients plus semi-permeable surface membranes. Today’s lecture will explain how these two factors are the basis for bioelectricity.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Q? : Is electric current in your body carried by same charge carriers as electric current in your house?
Background image of page 4
Household current is carried by electrons. Bioelectricity is carried by ions. Some are + charged, some are – charged. Key examples K+, Na + , Ca 2+ and Cl-. Answer: NO
Background image of page 5

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

View Full DocumentRight Arrow Icon
concentration everywhere, there would be no bioelectricity. Random distribution is expected based on the laws of diffusion. Diffusion applies to each chemical species
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2010 for the course BIOS 286 taught by Professor Murphy during the Fall '06 term at Ill. Chicago.

Page1 / 35

08-30-10 - Ionic Basis of Resting Membrane Electrical...

This preview shows document pages 1 - 7. Sign up to view the full document.

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