Nerves

Although it mights sound counterintuitive, the best way to get rid of a pins and needles sensation in your hands or feet is to move them around. The sensation is caused by a decrease in bloodflow and movement will restore bloodflow to that area.

The parts of the CNS that give rise to sympathetic nerves are the thoracic and lumbar regions of the spinal cord.

ACh is not degraded, therefore, prolonged depolorization is enforced on the post synaptic memebrane

synaptic cleft

The radial nerve supplies the muscles of the arm and forearm and and is also the sensory nerve for the upper limb. It therefore helps in the movement of the upper limb and is also partly responsible for sensory feeling in part of the arm, forearm and hand.

ventral posterolateral nucleus of the thalamus
thalamus
in the thalamus

Spinal tracts are communication pathways. There are numerous tracts and they carry messages from the body to the brain and from the brain to the body.

Motor Neurons

Effectors.

the pins and needles thing is that your hand has fallen asleep.the neck im not sure maybe it needs to be stretched. well this is good info my name is Tia.your welcome!:)

3; the superior, middle and inferior

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Neur- is the word root for neuritis, meaning inflammation of a nerve.

the longest dendrite is I don't know this /;[

eutrophication.

Types of Neurons

While there are many different kinds of neurons, there are three broad categories based on function:

1. Sensory neurons are sensitive to various non-neural stimuli. There are sensory neurons in the skin, muscles, joints, and organs that indicate pressure, temperature, and pain. There are more specialized neurons in the nose and tongue that are sensitive to the molecular shapes we perceive as tastes and smells. Neurons in the inner ear are sensitive to vibration, and provide us with information about sound. And the rods and cones of the retina are sensitive to light, and allow us to see.

2. Motor neurons are able to stimulate muscle cells throughout the body, including the muscles of the heart, diaphragm, intestines, bladder, and glands.

3. Interneurons are the neurons that provide connections between sensory and motor neurons, as well as between themselves. The neurons of the central nervous system, including the brain, are all interneurons.

Most neurons are collected into "packages" of one sort or another, sometimes visible to the naked eye. A clump of neuron cell bodies, for example, is called a ganglion (plural: ganglia) or a nucleus (plural: nuclei). A fiber made up of many axons is called a nerve. In the brain and spinal cord, areas that are mostly axons are called white matter, and it is possible to differentiate pathways or tracts of these axons. Areas that include large number of cell bodies are called gray matter.

The distance across a nerve synapse is 20 nanometres or 2x10-8 metres

True

oxytocin

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Mr. Salehi can answer the question... btw its a squid... =D

Unlike oligodendrocytes Schwann cells can only myelinate one axon. But the number of Schwann cells it takes to myelinate an axon depends on the axon length as a Schwann cell only myelinates one area between pairs of Nodes of Ranvier. Think of it like a string of sausage. the sting is the axon, each sausage is where a single Schwann cell myelinates that axon, as stated the length will determine the total number of Schwann cells needed for myelination, but a Schwann cell can only myelinate one axon.

The neuron adds up all the excitatory and inhibitory inputs and fires when they reach its threshold of excitation.

A nerve biopsy is performed to detect nerve-damaging conditions, including leprosy, necrotizing vasculitis (an inflammation of the blood vessels), other nerve inflammation, and damage or loss of the nerve's protective myelin sheath.

Because the negative pulse mimics the effect of an action potential, depolarising the nerve. Therefore propogating the AP along the nerve