What do nerves do for a muscle?

Answer 1

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.

Answer 2

Through impulses from the brain which needs magnesium and sodium to flow through nerves. These impulses go through the spine and are distributed to the various muscles in the body.

Answer 3

A small gland near the top of the kidneys that releases a chemical messenger (called adrenaline) into your heart and your respiratory system.

Answer 4

the nerves tell when and how the muscle needs to do its job.

Answer 5

Chemicals called neurotransmitters transmit messages to muscles and glands. In this case your are talking about acetylcholine.

Answer 6

The nerves signal the muscles when to contract and relax by chemical and electrical signals.