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Why a peripheral nerve such as the sciatic nerve can contain nerve fiber from several spinal nerves?
The reason why a peripheral nerve such as the sciatic nerve can contain nerve fiber from several spinal nerves is owing to nerve plexuses. These are networks of nerves all tangled together and found mostly in the limbs.
Does a peripheal nerve pass from the spinal chord into the limbs?
No, but a peripheral nerve does.
Repair of nerve fibers differ in the peripheral nervous system and the central nervous system?
How does the repair of nerve fibers differ in the peripheral nervous system and the central nervous system? How does the repair of nerve fibers differ in the peripheral nervous system and the central nervous system? How does the repair of nerve fibers differ in the peripheral nervous system and the central nervous system? How does the repair of nerve fibers differ in the peripheral nervous system and the central nervous system? We can help our nervous systems by improving our reflexes
Which nerve belongs to the peripheral nervous system A. Sciatic nerve B. Vagus nerve C. Optic nerve D. Trigeminal nerve?
sciatic
How is the size and shape of a nerve cell related to its function?
A neuron is a nerve cell in which, are circular cells that are bundled together known as ganglion. A actual nerve is attached to the nerve cell. There are two types of nerves ones that travel messages from the brain or to the brain. A nerve fiber that sends messages from the brain is called an axon fiber. The structure of an axon fiber includes myelin, which is a fatty substance stored on the outside of the nerve fiber to speed the message up. between each piece of myelin is a space called the node of ranvier that speeds the impulse up to. An alkali metal that is common and vital for all nerves is sodium. When a nerve impulse is taken place, the electrical activity passes through the sodium. Once the electrical activity has passed through the sodium atoms they become neutrally charged as they move towards the outside of the nerve fiber. The second type of nerve fiber is named a dendrite. The only difference the dendrite has is that it has no myelin sheath on the outisdeof the nerve to speed it up and also travels a lot slower than the axon fiber. Nerve fibers are bundled together in an actual nerve as the surrounding substance that keeps the nerve fibers together in the nerve is called perineurium. Towards the outside of the perineurium cluster is a substance named epineurium.
Why a peripheral nerve such as the sciatic nerve can contain nerve fiber from several spinal nerves?
The reason why a peripheral nerve such as the sciatic nerve can contain nerve fiber from several spinal nerves is owing to nerve plexuses. These are networks of nerves all tangled together and found mostly in the limbs.
Why is the nodes ranvier spaced equally along the axon?
The nodes Ranvier are spaced equally along the axon because of their function which is to transmit information to the different glands, muscles and neurons. The axon is also called a nerve fiber.
Where do axon collaterals emerge on a myelinated nerve?
nodes of ranvier
In order for a severed peripheral nerve to regenerate and recover its original function nerve fiber must sprout and enter tubes formed by?
Basement Membrane and connective tissues.
List the reasons for performing a peripheral nerve functions assessment?
A peripheral nerve function test is performed to test the nerve function in the peripheral nerve. This test is often performed to when there is pain or weakness in the limbs.
Gaps between segments of oligodendrocytes or between individual schwann cells are called?
The spaces along the axon and between the myelin sheath are known as the nodes of Ranvier. They are responsible for speeding up the signals that are transmitted along the axon of the nerve. While the myelin sheath consists of many layers that protect the axon, the nodes of Ranvier are uncovered, giving them the ability to produce an electrical charge.
Does the peripheral nervous system have sensory nerve cells and motor nerve cells.?
Yes, the peripheral nervous system has both sensory and motor nerve cells
What is the medical term meaning Benign tumor of the peripheral nerve sheath?
A benign peripheral nerve sheath tumor is a schwannoma or neurofibroma.
What are nerves and muscle fibers?
A nerve fiber is a threadlike extension of a nerve cell and consists of an axon andmyelin sheath (if present) in the nervous system. There are nerve fibers in the central nervous system and peripheral nervous system. A nerve fiber may be myelinated and/or unmyelinated. In the central nervous system (CNS), myelin is produced byoligodendroglia cells. Schwann cells form myelin in the peripheral nervous system (PNS). Schwann cells can also make a thin covering for an axon which does not consist of myelin (in the PNS). A peripheral nerve fiber consists of an axon, myelin sheath, Schwann cells and its endoneurium. There are no endoneurium and Schwann cells in the central nervous system. A myocyte (also known as a muscle cell or muscle fiber) [1] is the type of cell found inmuscle tissue. They are long, tubular cells that arise developmentally from myoblasts to form muscles in a process known as myogenesis. [2] There are various specialized forms of myocytes: cardiac, skeletal, and smooth muscle cells, with various properties. Cardiac myocytes are responsible for generating the electrical impulses that control the heart rate, among other things
Does a peripheal nerve pass from the spinal chord into the limbs?
No, but a peripheral nerve does.
What is required to maintain nerve fiber sheath?
required to maintain nerve fiber sheath
Providing a pathway for the transmission of nerve impulses is the responsibility of the?
peripheral nerve system
