BioScience Dictionary

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Found Action potential 5 times.

Displaying results 1 to 10.

1. Action potential (nerve impulse)
The sequential, electrochemical polarization and depolarization that travels across the membrane of a nerve cell (neuron) in response to stimulation (touch, pain, cold, etc.)

2. Action potential
A reversal of the electrical potential in the plasma membrane of a neuron that occurs when a nerve cell is stimulated; caused by rapid changes in membrane permeability to sodium and potassium.

3. Calcium channel
The calcium channel is the channel via which calcium cations pass through the cell membrane. In excitable cells the action potential results from the transmembrane fluxes of Na+, Ca2+ and K+.

4. Calcium channel blocker
A calcium channel blocker is a drug that interferes with the generation of an action potential in cells dependent on the calcium current for their activation; verapamil, nifedipine, and diltiazem belong to this class. By reducing the flux of calcium, these drugs slow down the heart rate, and lower blood pressure thereby reducing oxygen demand of the heart. These drugs are used to treat angina, and hypertension.

5. Inhibitory postsynaptic potential
An electrochemical potential across the postsynaptic membrane of a neuron which inhibits the formation of an action potential in the neuron.