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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

What relays information for muscles?

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 major nerve serves the lateral leg and foot?

deep peroneal nerve from the common peroneal never

A reflex pathway having only one synapse in the CNS?

Reflexes are rapid involuntary responses to a given stimuli. The reflex pathway that only has one synapse in the CNS is called the monosynaptic reflex arc.

How does a message. travel across the gap. at a synapse?

it is sent through the neurotransmitters

At the synaptic terminal an electrical impulse will trigger the migration of vesicles containing neurotransmitters toward the presynaptic membrane.

How do the nerves work?

The nerves are all over your body, and look similar to veins on a diagram of an animal, the nerves go close to the surface of your skin, when you touch something, the nerves let you know by sending information to your brain, and when you get used to the temperature of the water, it's just that the nerves stop telling you it's hot/cold.

Skidget

Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?

Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.

Does a synapse separates the axion end of one neuron to the dendrite end?

Yes, a synapse is the space (a VERY SMALL one!) between the axon of one neuron and the dendrites of the next neuron.

Which cranial nerve lies medial to the vagus nerve?

That would be the hypoglossal nerve, which lies medial from the vagus, accessory, glossopharyngeal nerves.

How many neurons are in a dog's brain?

160 million. And even though a dog's brain is usually larger than a cat's brain, cats have almost twice as many neurons as dogs with 300 million of them.

Why is an efferent neuron multipolar?

Efferent neuron is a neuron that regulate the action of a muscle, gland, or other effector tissue. It is a neuron which produces impulses outward from the brain or spinal cord, so its consider a multi-polar neuron.

Is a flow chart appropriate to illustrate the process of synaptic transmission?

no, because a diagram should be used to represent the process
Flow chart to illustrate the events occurrung in an axon of a neuron with the arrival of a nerve impulse

What stimulates the release of neurotransmitters allowing neurons to communicate with each other?

Once action Potential reaches Dendrides of the Neuron, the cell is Depolarized, causing the cell (neuron) to release a chemical signal, known as a nuerotransmitter, from the Pre-synsaptic cleft, where it will bind to recepters on the Post-synaptic cleft.

No grip and pins and needles in hand?

i have nogrip in both hands and pins a niddles in thumb and first 3 fingers

What does novocain do to neurons and their transmission of impulses?

i have no idea but based of other thing and my expirence

nova blocks the pulse tranmistion causing numbness to the sencitivity of the nerves also the needle use to enject it is very long and pain full

[btw im 13] but i know alot

When is an impulse an electrical signal?

When a stimulus causes positively charged ions to diffuse into the neuron.