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What are the two kinds of branches that extend from the cell body of a neuron what does each do?
The ones carrying the input are the dendrites, the ones carrying the output are the axons.
Do Most neurons have many axons?
One
How many axons does each neuron have?
Most neurons contain one axon. There have never been more than one found. However, some neurons contain no axon at all.
What are the three broad categories of neurons?
Functional types of neurons: 1. sensory (afferent) neurons - input to CNS from sensory receptors; dendrites located at receptors, axons in nerves, cell bodies in ganglia outside the CNS 2. motor (efferent) neurons - output from CNS to effectors cell bodies and dendrites located in the CNS, axons in nerves 3. interneurons - communicate and integrate information within the CNS; located entirely within the CNS
What is the function of a neuron's dendries?
In general, but not always, dendrites receive neurochemical information from neurotransmitters released by axons. Dendrites are branched extensions of the neuronal cell body, or soma, that receive information from other neurons. The dendrite is the post-synaptic portion of many synapses within the nervous system that contains synaptic receptors that bind to neurotransmitters and respond by excitation or inhibition of the membrane potential.
What is the function of the motor neuron?
Neurons come in many sizes. For example, a single sensory neuron from your fingertip has an axon that extends the length of your arm, while neurons within the brain may extend only a few millimeters. Neurons have different shapes depending on what they do. Motor neurons that control muscle contractions have a cell body on one end, a long axon in the middle and dendrites on the other end; sensory neurons have dendrites on both ends, connected by a long axon with a cell body in the middle.
What do nerves do for a muscle?
There are things called neurons that have parts called dendrites and axons. The dendrites of a neuron are branching, tubelike extensions of the cell body that form a pattern resembling the limbs of a tree. Most neuron cell bodies have about six main dendrites, each of which is two or three times as thick as the axon of the cell. The distance between the cell body and the tips of the dendrites is about 0.5 millimetre. Dendrites are specialized structures for receiving impulses they are like mailboxes, mostly from the axon of another neuron. Dendrites and axons do not quite touch each other. In almost all cases, they are separated by an extremely narrow space called the synaptic cleft, over which nerve impulses are transmitted. These places where one neuron communicates with another are called synapses.The axon, also called the nerve fibre, is a tubelike extension of a neuron cell body. The axon is specialized to carry messages. An axon of one neuron may have enough branches to make contact with as many as 1,000 other neurons. Most axons in the central nervous system are less than 1 millimetre long. However, many axons in the peripheral nervous system are longer, and some are much longer. For example, the axons that extend from the spinal cord to the muscles in the feet may be 75 to 100 centimetres long. The structures commonly called nerves are actually bundles of axons lying next to one another in a cordlike formation. Nerves can be made up of the axons of motor neurons or sensory neurons, or of both. Some axons are covered by a sheath of a white, fatty substance called myelin. The myelin increases the speed of impulses along the axons. Myelin also causes the distinction between the grey matter and white matter in the nervous system. Grey matter consists largely of unmyelinated axons (axons without myelin sheaths) and neuron cell bodies. White matter is made up mostly of axons that have white sheaths of myelin. Myelin is formed in the peripheral nervous system by Schwann cells, which are special supporting cells that surround the axons. In the central nervous system, supporting cells called glia produce myelin.There are things called neurons that have parts called dendrites and axons. The dendrites of a neuron are branching, tubelike extensions of the cell body that form a pattern resembling the limbs of a tree. Most neuron cell bodies have about six main dendrites, each of which is two or three times as thick as the axon of the cell. The distance between the cell body and the tips of the dendrites is about 0.5 millimetre. Dendrites are specialized structures for receiving impulses they are like mailboxes, mostly from the axon of another neuron. Dendrites and axons do not quite touch each other. In almost all cases, they are separated by an extremely narrow space called the synaptic cleft, over which nerve impulses are transmitted. These places where one neuron communicates with another are called synapses.The axon, also called the nerve fibre, is a tubelike extension of a neuron cell body. The axon is specialized to carry messages. An axon of one neuron may have enough branches to make contact with as many as 1,000 other neurons. Most axons in the central nervous system are less than 1 millimetre long. However, many axons in the peripheral nervous system are longer, and some are much longer. For example, the axons that extend from the spinal cord to the muscles in the feet may be 75 to 100 centimetres long. The structures commonly called nerves are actually bundles of axons lying next to one another in a cordlike formation. Nerves can be made up of the axons of motor neurons or sensory neurons, or of both. Some axons are covered by a sheath of a white, fatty substance called myelin. The myelin increases the speed of impulses along the axons. Myelin also causes the distinction between the grey matter and white matter in the nervous system. Grey matter consists largely of unmyelinated axons (axons without myelin sheaths) and neuron cell bodies. White matter is made up mostly of axons that have white sheaths of myelin. Myelin is formed in the peripheral nervous system by Schwann cells, which are special supporting cells that surround the axons. In the central nervous system, supporting cells called glia produce myelin.
The many short strands branching out from a neuron that carry messages to the cell body?
im not sure but i think its an axon or dendrites
Sensory neurons of the PNS are?
Unipolar Sensory Neurons: large myelinated neurons with the cell body off to one side of the single dendritic-axon process. Multipolar Motor Neurons: large myelinated neurons that have many dendrites off the cell body and an axon that may branch to effect many effectors.
The term that refers to groups of myelinated axons from many neurons supported by neuroglia is?
White matter (myelin has a whitish color)
What is Johannes Purkinje famours for?
He is best known for his 1837 discovery of Purkinje cells, large neurons with many branching dendrites found in the cerebellum.
Where are dendrites found?
Parts of neurons, which are found in the brain.
