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Where does a nerve impulse start?
A nerve impulse typically starts at the dendrites of a neuron, where it receives signals from other neurons or sensory receptors. These signals are then transmitted down the axon of the neuron to the axon terminals, where they can communicate with other neurons or target cells.
What influences the speed of a nerve impulse?
the diameter of an axon
Neurotransmitters are released from what end of an axon?
synaptic vesicles
What is the membrane of a nerve cell is comprised of?
Its main function is to propagate the action potential (the 'impulse') along the length of the axon.
A nerve impulse starts at the dendrite then travels to the?
cell body, continues down the axon, and finally reaches the axon terminal. At the axon terminal, the impulse triggers the release of neurotransmitters to communicate with other neurons or muscles.
How is an impulse communicated from nerve cell to nerve cell?
Via chemical messangers that cross the synapse.
What are mircroscopic fiber that carries the nervous impulse along a nerve cell?
axon
How does a nerve impulse cross the gap between the axon and the next?
Curently unknown...
What is the material surrounding the axon that increases the speed of the nerve impulse?
The material surrounding the axon that increases the speed of the nerve impulse is called myelin. Myelin is a fatty substance that acts as an insulating layer, allowing for faster transmission of electrical signals along the axon.
Which of the following does not factor into the rate of impulse propagation?
One factor that does not influence the rate of impulse propagation is the size of the neuron. The rate of impulse propagation is determined mainly by the myelination of the axon, the presence of nodes of Ranvier, and the diameter of the axon.
When the nerve impulse hops from node to node to the axon terminal?
This is called saltatory conduction.
The greater the amount of coating the axon the faster the nerve impulse will be transmitted to the synapse?
myelin
