Nerve Impulse Project
Jacob Howard, Wyatt Stroud, Gustavo P.
Resting Membrane Conditions
When neurons are at rest, their sodium ions are on the outside of the cell body and their potassium ions are on the inside. When the sodium ions are now on the inside and the potassium are on the outside, the neurons are not resting anymore.
Generation of a Nerve Impulse
A nerve impulse is generated in an "all or none" response when a stimulus is strong enough. This means a stimulus strong enough to generate a nerve impulse has been given. The stimulus triggers chemical and electrical changes in the neuron. A resting neuron is polarized with different charges on either side of the cell membrane before an impulsive is received. Depolarization is when an electrical impulse is caused from the rushing in and out of the ions. Nerve impulses increase glial intercellular permeability.
Conduction of the Impulse
Action potential is a nerve impulse that allows Sodium and Potassium channels to be conducted down an axon. It works with the electricity and ions that cause impulses to be fired. Each type of channel protein has a specific function in the electrical activity of neurons. (a) Resting K+ channels are responsible for generating the resting potential across the membrane.The myelin sheath is a greatly extended and modified plasma membrane wrapped around the nerve axon in a spiral fashion.
One Nueron To The Other
Synapses are the junctions where neurons pass signals to other neurons, muscle cells, or gland cells. Axon terminals function as neurotransmitters at various chemical synapses.At chemical synapses, impulses are transmitted by the release of neurotransmitters from the axon terminal of the cell. Membrane proteins function in vesicle docking and fusion.