BB lecture 10-08-08 action potential

BB lecture 10-08-08 action potential - Review.. Passive...

Info iconThis preview shows pages 1–6. 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

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

View Full DocumentRight 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: Review.. Passive transport involves .?........ . Active transport involves ..?...... . What are the two forces that establish an electrochemical gradient ? In what direction do specific ions move when transported by a Na/K pump ? Can you describe the movement of different solutes in co-transport ? What type of bulk transport mechanism has specificity? The voltage across a membrane is called .?........ . The inside of a cell is relative to the outside of the cell. What maintains the resting potential of a neuron? Name the three types of gated channel proteins. Chapter 48 (pp.1052-1056): Neurons - Cell communication by action potential Learning objectives: Be able to draw a typical vertebrate neuron and label its major features. Understand how a change in membrane permeability can affect membrane potential. Be able to diagram the phases of an action potential and explain the opening/closing sequences of the Na-channels and K-channels at each phase. Terms to know includedepolarization, hyperpolarization, threshold, pre/post-synaptic cell, chemical synapse, saltatory conduction, graded potential, synaptic cleft, neurotransmitter.--------------------------------------------------------------------------------------------------------------- [For Wednesday and/or Friday] Chapter 11 (pp.206-225): Cell communication Explain the three stages of cell signaling: Reception, transduction, & response Terms to know includeligand, paracrine signaling, relay molecule, G protein-coupled receptor, receptor tyrosine kinase, ion channel receptor. A vertebrate neuron Dendrites Cell body Nucleus Axon hillock Axon Signal direction Synapse Myelin sheath Synaptic terminals Presynaptic cell Postsynaptic cell Reference Figure 48.4 (modified) The resting potential is negative (-70 to - 80 mV) inside the cell. When the membrane potential becomes more negative , it is hyperpolarized . When the membrane potential becomes less negative , it is depolarized . Figure 48.9 Graded potentials and an action potential in a neuron +50 50 100 +50 50 100 +50 50 100 Time (msec) Time (msec) Time (msec) 0 1 2 3 4 5 0 1 2 3 4 5 1 2 3 4 5 6 Threshold Threshold Threshold Resting potential Resting potential Resting potential Hyperpolarizations Depolarizations Membrane potential (mV) Membrane potential (mV)...
View Full Document

Page1 / 31

BB lecture 10-08-08 action potential - Review.. Passive...

This preview shows document pages 1 - 6. Sign up to view the full document.

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