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What is the wave of excitation through nerve fibers and neurons?
Wiki User
∙ 6y ago
The wave of excitation through nerve fibers and neurons is called a shiver.
Wiki User
∙ 6y ago
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What is a group of axons bundled together called?
a nerve is bundled together by neuron fibers. The CELL BODY OF A NERVE or neuron is surrounded by satellite cells.
Another name for a bundle of nerve fibers is what?
It is called a dendrite.~
What tissue sends messages from brain to body?
Nerve cells called neurons sends messages from brain to body along fibers called axons.
Which cells in your body are never replaced?
Cells
How does nerve cells communicate?
The nervous system is composed of more than 100 billion neurons connected to each other, through from few hundred to 2,00,000 nerve terminals of each nerve fibers. On one hand you have dendrites and other hand you have axon terminals connected to each other and target organs.Connections between nerve cells are called synapses. A wave of depolarization passes through nerve fibers from dendrite to axon and in synapses you have various type of neurotransmitters. And at muscle end you have motor end plate passing the impulse through neurotransmitters. And you have various types of sensory apparatuses, carrying the appropriate impulse to central nervous system
A bundle of nerve fibers?
The bundle of the nerve fibers is a collection of the threadlike extension of the nerve cell that consists of the myelin sheath and axon in the nervous system. There are nerve fibers in the peripheral nervous system and the central nervous system.
Anterior root of the spinal cord is composed of?
The anterior root is composed of nerve fibers responsible for motor activity (i.e. efferent nerve fibers that will stimulate muscles, etc.). I think some of the things it is composed of include:Gamma motor neurons, alpha motor neurons, preganglionic autonomic neurons
Is Ganglia associated with afferent nerve fibers contain cell bodies of sensory neurons?
sensory
What are neurofibrillary tangles?
Neurofibrillary tangles are twisted masses of protein fibers inside nerve cells, or neurons.
Th long and short thread-like fibers that differentiate nerve cells from other cells are called?
neurons
CAN reflex action controlled by spinal cord?
Simple reflexes are controlled by the spinal cord. The message travels from the sense receptors near the skin through the afferent nerve fibers to the spinal cord. In the spinal cord, the messages are relayed through association neurons to the efferent nerve fibers, which carry them to the muscle cells that cause the reflex movement.
Does the white rami communicans contain fibers of a preganglionic or postganglionic neurons?
Preganglionic because they are myelinated. FALSE
What part in the human body receives nerve impulses from the central nervous system that causes muscle fibers to contract?
Motor Neurons.
What is a group of axons bundled together called?
a nerve is bundled together by neuron fibers. The CELL BODY OF A NERVE or neuron is surrounded by satellite cells.
Another name for a bundle of nerve fibers is what?
It is called a dendrite.~
Where do upper neurons descend on lower neurons?
Movement is controlled by motor neurons that innervate muscles. Motor neurons can be classified by their location as upper motor neurons or lower motor neurons.Upper motor neurons have cell bodies in the somatosensory and motor cortex of the brain that send axons down to the spinal cord or brainstem. Upper motor neurons descend through the posterior limb of the internal capsule in the cerebrum, through the crus cerebri of the midbrain, through the basilar pons, through the medullary pyramids, crossing midline at the pyramidal decussation in the caudal medulla, and descending through the anterior and lateral corticospinal tracts of the spinal cord to terminate at their respective ventral horn levels. Corticobulbar fibers are upper motor neurons that innervate brainstem nuclei for cranial nerves. They descend through the genu of the internal capsule of the cerebrum to various brainstem cranial nerve nuclei or reticular formation nuclei that innervate brainstem cranial nerve nuclei.Lower motor neurons have cell bodies in the ventral horns throughout the spinal cord. These motor neurons receive excitation information from the upper motor neurons as well as a large amount of modulating input from a variety of other neuronal sources. For cranial nerves the lower motor neurons are located within the brainstem cranial nerve nuclei: occulomotor nucleus, trochlear nucleus, abducens nucleus, trigeminal motor nucleus, facial nucleus, spinal accessory nucleus, hypoglossal nucleus, & nucleus ambiguous.
Nerve impulses travel to the muscles from the spinal cord through?
afferent neurons
