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When an impulse travels to the brain, it is first received by sensory receptors, then sent through the neurons by an electrical current. When the neuron receives the signal from a sensory receptor or from another neuron, the nucleus processes the impulse and then sends it down the axon. When a neuron is resting, the inside of the cell has a negative charge caused by active transport of NA and K molecules. This is called the resting potential. When the impulse hits the axon, the electricity causes NA pumps to open, allowing a flow of positively charged the molecule into the cell, causing the charges to switch. This is called the action potential. As the impulse passes, the K pumps open, restoring the original charge. When the impulse reached the end of the axon, neurotransmitters chemically pass the impulse to the next neuron. ;
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Which travels quicker through the body a nerve impulse or a hormons?
a nerve impulse
Where does the nerve impulse travel from the reflex arc?
The nerve impulse travels through the reflex arc. It travels from the sensor through the sensory neurone, through the spinal cord and motor neurone to the effector muscle.
The message that travels through a neuron?
A neural impulse. Specifically, once it fires, an action potential.
How fast does a nerve impulse travels?
It 200 miles per hour And it can probally be in meters too.
A nerve impulse starts at the dendrite then travels to the?
axon
The neurotransmitters of a neutron enable a nerve impulse to do what?
they transport the nerve impulse through the synapses (:
What direction does nerve impulse travel?
Along a nerve cell, the impulse travels from the axon to the dendrites and then again to the axons through the synapse.
How is an impulse communicated from nerve cell to nerve cell?
Via chemical messangers that cross the synapse.
What are function of SA nodes?
There is only one SA(sinoatrial) node. It is located by the right atrium of the heart. it initiates the nerve impulse which travels through both atria to initiate atrial contraction. Then the impulse travels to the AV(atrial ventricular) node. the nerve impulse travels through the intraventricular septum to the apex of the heart, where it initiates the contraction of the ventricles(starting from the apex and squeezing the blood up and out of the arteries).
Describe how the nerve impulse travels in the heart?
The brain can influence the heart in two ways. Sympathetic and parasympathetic stimulation. Parasympathetic stimulation of the heart is through the vagus nerve. Sympathetic stimulation of the heart is via cervical and thoracic splanchnic nerves. The heart has its own pacemaker cells, so the brain only changes the rate and contractility of the heart.
What is the direction of impulse in a neuron?
A nerve impulse travels toward the actual nucleus itself to pass information.
The nerve impulse travels as an electric charge and as it nears the synapse it becomes?
A chemical signal.
