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The point at which an impulse from one nerve cell is communicated to another nerve cell is what?
Wiki User
∙ 12y ago
When the -65mV resting potential is raised to around -40mV by incoming action potentials from connected nerves, sodium ion channels open, allowing these positive ions to enter the cell. The membrane potential quickly raises from -40mV to around +40mV. Sodium ion channels open in front of the charge (allowing the charge to move forwards) and Na+/K+ATPase (an ion channel that removes sodium ions from the axon and pumps in potassium ions) activation behind the charge dispels the charge behind the wave. This way the action potential is sent forwards as a single wave of positive charge.
Wiki User
∙ 13y ago
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What is the correct order that information passes through in a neuron?
The flow of information across nerve cells is called a nerve impulse in which the axons of the cell must depolarize, repolarize and go through a refractory period before reaching the resting potential. At this point, another impulse can occur.
What is the point at which a nerve impulse is sent from one nerve cell to another?
It diffuses across a small gap called a synapse between the two nerve cells. It is passed as a neurotransmitter (in chemical sacs). They reach the end of one cell and the impulse is converted into neurotransmitters, which are released from that cell, diffuse across the gap, and land on the receptor site, where they are converted back into electrical impulses.
What is the amount of stimulation required to intiate a nerve impulse called?
Neuron has to be stimulated to the point of it's threshold in order for an action potential to be initiated and transmitted
What are the two main neurotransmitters in human brain?
A neurotransmitter is a chemical which carries the nerve impulse from the end point of a nerve cell to the dendrites of the next nerve cell. A hormone is a chemical substance which is secreted by an endocrine gland directly into the blood stream or plasma in which it travels to a specific target organ and brings about a change in them.
What is the motor point of a nerve?
The nerve motor points is a large muscle mass of shoulders, arms, and legs, striking with leg or hand. Some types of nerve points are superficial peroneal nerve motor point, tibial nerve motor point, common peroneal nerve motor point, and femoral nerve motor point.
What is the correct order that information passes through in a neuron?
The flow of information across nerve cells is called a nerve impulse in which the axons of the cell must depolarize, repolarize and go through a refractory period before reaching the resting potential. At this point, another impulse can occur.
Nerve impulse consists of a wave of moving away from a point of stimulation?
action potentials
What direction does nerve impulse travel?
Along a nerve cell, the impulse travels from the axon to the dendrites and then again to the axons through the synapse.
How is nerve impulse conducted along a myelinated nerve fiber?
In non-myelinated axons, the nerve impulse is going to be produced when the action potential accross a membrane makes a wave of depolarization followed by a wave of repolarization. With the absence of the myelin, the impulse is transmitted continuously throughout the membrane. In a non-myelinated nerve, once an end of the cell, the dendrite, is depolarized, the depolarization a.k.a., the action potential, moves along the nerve membrane, and the area of membrane immediately behind the depolarized section becomes repolarized.
What is the point at which a nerve impulse is sent from one nerve cell to another?
It diffuses across a small gap called a synapse between the two nerve cells. It is passed as a neurotransmitter (in chemical sacs). They reach the end of one cell and the impulse is converted into neurotransmitters, which are released from that cell, diffuse across the gap, and land on the receptor site, where they are converted back into electrical impulses.
A neuron reaches its trigger point when?
Action potential is nerve impulse triggered when a neuron reaches its threshold, or trigger point for firing. Threshold trigger point for a neuron's firing about negative 50 millivolts.
How is an impulse transmitted between neurons?
The point at which two neurones meet is called the synapse. At this point there are 2 situations:1: there is no gap, the neurones are physically connected by gap-junctions. This is a rarer situation but does occur. In this case the nerve impulse continues down the second neurone (known as the post-synaptic nerve)2: there is a small gap (a few micrometers) between the cells. In this case the first nerve, carrying the impulse, (pre-synaptic) causes a release of a chemical known as a neurotransmitter. There are various types of neurotransmitters and each are involved in different situations. When the neurotransmitter reaches the 2nd nerve it binds to the membrane (in most situations) which either causes the cell to depolarize and continue the impulse, or causes hypo-polarization which prevents any other nerve stimulating it.Short and Simple Answer:Nerve impulse is transmitted by:- nerve impulse triggers transmitter substance- which diffuses across synapse- the transmitter substance binds with receptor molecule in membrane of next molecule
What does no response mean in an EMG test?
"No Response," or NR, generally occurs during the nerve conduction portion of an electrodiagnsotic examination (often called an EMG). When performing a nerve conduction study an electrical impulse is transmitted through a nerve and recorded at a point distant to that point of stimulation. Normally when this impulse is recorded as a waveform that is produced on the screen for the electromyographer to evaluate. An NR occurs when a waveform cannot be elicited with an electrical impulse. This finding suggests that the nerve being tested has suffered loss of function of some or all of its axons. This does not mean that the nerve being studied is completely dead, but it does suggest significant loss of function in that particular nerve. This "NR" finding may also may be the result of a technical error on the part of the electromyographer.
What is the amount of stimulation required to intiate a nerve impulse called?
Neuron has to be stimulated to the point of it's threshold in order for an action potential to be initiated and transmitted
Describe the pathway an impulse travels macroscopically through the nervous system from the brain to the muscle?
The NeuronThe cells that carry information through your nervous system are called neurons, or nerve cells. The message that a neuron carries is called a nerve impulse. The Structure of a Neuron:The structure of the neuron enables it to carry nerve impulses. A neuron has a large cell body that contains the nucleus, threadlike extensions called dendrites, and an axon. The dendrites carry impulses toward the neuron's cell body. The axon carries impulses away from the cell body. Nerve impulses begin in a dendrite, move toward the cell body, and then move down the axon. A neuron can have many dendrites, but it has only one axon. An axon, however, can have more than one tip, so the impulse can go to more than one other cell. Axons and dendrites are sometimes called nerve fibers. Nerve fibers are often arranged in parallel bundles covered with a connective tissue, something like a package of uncooked spaghetti wrapped in cellophane. A bundle of nerve fibers is called a nerve.Kinds of Neurons:Three kinds of neurons are found in the body-- sensory neurons, interneurons, and motor neurons.A sensory neuron picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulse. The impulse travels along the sensory neuron until it reaches the interneuron, usually in the brain or spinal cord. An interneuron is a neuron that carries nerve impulses from one neuron to another. Some interneurons pass impulses from sensory neurons to motor neurons. A motor neuron sends an impulse to a muscle or gland, and the muscle or gland reacts in response.How a Nerve Impulse TravelsThe Synapse:What happens when a nerve impulse reaches the axon tip at the end of a neuron? At that point, the impulse can pass to the next structure. Sometimes the structure is a dendrite of another neuron. Other times, the structure is a muscle or a cell in another organ, such as a sweat gland. The junction where one neuron can transfer an impulse to another structure is called a synapse. (SIN aps). How an Impulse is Transferred:For a nerve impulse to be carried along at a synapse, it must cross the gap between the axon and the next structure. The axon tips release chemicals that carry the impulse across the gap.You can think of the gap at a synapse as a river, and an axon as a road that leads up to the riverbank. The nerve impulse is like a car traveling on the road. To get to the other side, the car has to cross the river. The car gets on a ferry boat, which carries it across the river. The chemicals that the axon tips release are like the ferry, carrying the nerve impulse across the gap.
How does sensory impulse move throughout the body?
The nerve impulse travels through and reaches the threshold potential which opens Na+ Channels in the cell membrane. The Na+ ions diffuse into cell. The charges reverse at that point on the neuron, and which the cell becomes depolarized. Positive inside; negative outside. source: FM
What is the path a nerve impulse travels throughout your body from stimulus to response-?
from the point of the impulse to the brain through neuronsAcetylcholine- a neurotransmitter released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction2000+words. A+ Answer. 100% Correct.Download the complete answer from following web linkwww.tinyurl.com/stepuponstepEnjoy
