AP_Bio_-_nerve_cell_signalling -...

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

View Full Document Right Arrow Icon
AP Bio - Specialized Cell Communication: Nerve Cells Guided Notes I. Review Membrane Potential a. Key ions: Na+ , K+ , Cl- , organic anions , Ca 2+ b. Resting membrane potential is about -70 mV  (neg inside, pos out) c. d. What can change the membrane potential? e. Animated tutorial #1 (www.thelifewire.com) II. Neuron Structure:  Dendtrites, cell body, axon hillock, axon, Schwann cell,  Node of Ranvier III. Changes in Membrane Potential a.  Graded Potentials (changes that can “build upon” one another) i. Hyperpolarization: 1. K+ channels open, K+ moves out;  reduces the internal  charge even more 2. This can inhibit an action potential ii. Depolarization:
Background image of page 1

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

View Full DocumentRight Arrow Icon
1. Na+ channels open, Na+ moves into cell;  brings  membrane potential closer to zero 2. This makes an action potential more likely 3. there is a threshold potential  which can cause an action 
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/16/2011 for the course BIO 102 taught by Professor Brey during the Fall '08 term at Rutgers.

Page1 / 4

AP_Bio_-_nerve_cell_signalling -...

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