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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
Neural transmission across a mammalian synaptic gap is accomplished by?
impulses causing the release of a chemical signal and its diffusion across the synapse.
How many motor neurons are involved in the descending motor pathways?
two motor neurons are always involved in descending motor pathways. the upper motor neuron and the lower motor neuron.
What portion of the motor neuron is in the nerve?
A motor neuron is a nerve, specifically it is a nerve that originates in the central nervous system (brain and spinal cord) and ends in its target organ (muscle, gland etc).
What happens when two neurons meet?
these two neutrons are both nuetrally charged there will be no reaction. the Purpose of a neutron is too separate the protons from each other
Microglia
What does a pelvic splanchnic nerve contains?
Preganglionic parasympathetic fibers.
In the Parasympathetic division, the preganglionic axons leave the ventral roots of the spinal cord and collectively form the pelvic splanchnic nerves.
What is the function of the relay nerve?
Neurons are only capable of carrying a message in one direction. Sensory neuronsare afferent neurons, meaning they only relay information to the brain. Motor neuronsare efferent neurons, meaning they carry information from the brain to the target.
In certain instances, it would take too long for information to go to the brain and then come back with an action in response. Instead, relay neurons, or interneurons relay information from sensory neurons to motor neurons, bypassing the brain. Think about touching a blazing hot stove. If the signal went all the way to your brain and back, your hand would be much more damaged than the instant jerk away from the stove that normally happens.
Sensory neurons carry signals from the receptors in our body (e.g. thermal, pressure etc.) to the relay neurons, which are found in our spinal cord. Relay neurons then send signals along the spinal cord to the brain. The brain then processes the information and sends a signal back down the spinal cord, through the relay neurons. Relay neurons then sends signals to motor neurons, which will then affect the muscles' movements.
Read more: What_does_neuron_cells_do
What is a neuron serving as part of the conduction pathway between sensory and motor neurons?
Interneurons are neurons found within the central nervous system (primarily the brain or spinal cord) that connect sensory (afferent) neurons to motor (efferent) neurons. Often these neurons are part of a polysynaptic reflex arc.
interneurons. They are also called association neurons.
What does anxiety do to the nerves?
Anxiety can do these following things to you:
-Make you feel emotional, depressive, worried, angry, useless and weak.
-Makes your whole body tense.
-Carrys on and gets worse if you don't get help.
-Gives you very low confidence.
-Makes you think too much about things.
-Makes your energy levels go down, making you hungrier easier.
-Makes you frustrated and sometimes gives you tummy aches with so much stress.
-You need to go to the toliet more often.
-Shaking hands, sweaty palms, feeling very sick, sometimes makes you sick.
Etc ...
How do neurons differ from other animal cells?
because one is a piece of poo the other piece of dog scat
What type of nerve cells act as a nerve glue as they support and protect the neuron?
The type of nerve cells are called neuroglia.
Is it safe to fly if you have a swelling on the optic nerve?
No, not without the SPECIFIC permission of your Doctor.
Voltage-gated Sodium ions and Potassium ions channels
What chemical substance carries information across the synaptic gap to the next neuron?
neurotransmitters
Ventral means in front. Thecal sac means the sac that contain the spinal cord and cerebro spinal fluid. Effacement of the ventral thecal sac means pressure is upon the front of the sac (producing a flattening effect) most likely from a disc protrusion. Foramen means hole (where the nerve comes out of from the spinal cord). Stenosis means narrowing (usually from bony degeneration or disc herniation/protrusion/or bulge). Left foraminal stenosis means narrowing of the passageway where the nerve comes through.
How does information travel along the axon of a sensory neurone?
the receptor detects the stimulus and the sensor neurone sends it to the CNS (central nervous system
Bipolar neurons are found in the retina and olfactory nerve in the nose.
Is there surgery to restore function to a limb if a nerve dies?
No not at the moment. However it seems that some nerve function can be restored by a limb re attachment or transplant.
