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What else can I help you with?
When you touch something hot a neuron in you finger senses the temperature which happens first?
an action forms
What is the space between two neurons called?
The space between the ending of one neuron and the communication with the next neuron is called the synapse, or sometimes it is called the synaptic gap or synaptic cleft. But synapse is the common term.
Can a moving object have impulse in itself?
yes moving objects have impulse
What substance undergoes osmosis?
Water moves across the cell membrane through the process of osmosis.
What goes through Cities and fields but never moves?
grass or roads
How does a signal move through a neuron?
A signal moves through a neuron by traveling along the axon, which is a long, thin extension of the neuron. The signal is transmitted as an electrical impulse called an action potential. When the signal reaches the end of the axon, it triggers the release of neurotransmitters, which then carry the signal to the next neuron.
What causes an electrical impulse to move down a neuron?
An electrical impulse, or action potential, moves down a neuron due to the rapid influx and efflux of ions across the neuron's membrane. When a neuron is stimulated, sodium channels open, allowing sodium ions to enter, which depolarizes the membrane. This change in voltage triggers adjacent sodium channels to open, propagating the impulse along the axon. The process is facilitated by the myelin sheath, which insulates the axon and allows for faster transmission through saltatory conduction.
State the three main parts of a neuron and describe how an impulse travels through a neuron?
Okay, information is received through the dendrites, and then moves on the the cell body. From there, the cell's axon passes the message on to other neurons or to muscles or glands.
How neurone work?
Neurons carry messages by converting a chemical signal into an electrical one, and vice versa. The dendrites of the neuron receive "messages" from chemicals that were released by another neuron. These chemicals are called "neurotransmitters". The neurotransmitter stimulates the neuron to depolarize. This means that the neuron's cell membrane becomes more permeable to sodium, and sodium moves into the cell. This causes the electrical charge of the cell to change, because sodium is positively charged. When it moves into the cell, the inside of the cell (or neuron) becomes less negatively charged and more neutral. At the same time, the area outside the cell becomes more negatively charged because of the positive sodium ions leaving that space. This rapid change in electrical charge is called "depolarization" and is essentially an electrical impulse. If the electrical charge is drastic enough (i.e., it meets the "threshold potential" by changing by at least 15 to 20 millivolts) the electrical signal carries all the way down the neuron into the axon. In the axon, a myelin sheath, or fatty covering, covers the neuron and essentially acts as insulation so that the electrical impulse can travel more quickly. Once the impulse reaches the axon terminal, it signals neurotransmitters to be released from that neuron and be interpreted by another neuron. Hence, the process starts all over again. I apologize for this answer being so long, there really is no way to answer this question briefly.
What is the order of impulse conduction thru reflex arc?
A reflex is an automatic response, that protects the organism from a harmful stimulus. The receptors detect a stimulus which generates a nerve impulse along the sensory neurone to the Central Nervous System (CNS). The CNS decides the appropiate response to the stimulus. The nerve impulse then travels across a synapse to the relay neurone, across another synapse to the motor neurone to the effector. This is normally a muscle or an organ which moves or responds to bring about a response appropiate to the stimulus.
A wave of depolarization moves down the neuron?
A wave of depolarization occurs when there is a sudden influx of positive ions, typically sodium ions, into the neuron, leading to a reversal of the cell's membrane potential. This helps in transmitting electrical signals along the neuron through a process known as action potential propagation.
What is the correct progression of the cardiac impulse?
The cardiac impulse progresses in a specific sequence: it starts at the sinoatrial (SA) node, which generates an electrical impulse that spreads through the atria, causing them to contract. The impulse then reaches the atrioventricular (AV) node, where it pauses briefly before traveling down the bundle of His, branching into the right and left bundle branches. Finally, the impulse moves through the Purkinje fibers, leading to the contraction of the ventricles. This coordinated progression ensures effective pumping of blood throughout the heart and body.
When a single neuron sends a strong enough impulse to a muscle that moves one of your eyeballs how many muscle fibers does it cause to contract?
When a single neuron sends a strong enough impulse to a muscle that moves the eye, it typically causes a contraction in a relatively small number of muscle fibers, often ranging from a few dozen to a few hundred. This is due to the precise control required for eye movements, which allows for fine motor coordination. The exact number can vary depending on the specific muscle and the task being performed.
What is the reaction of an organism to stimuli?
For an instant, unlearned response, it does it with its reflex arc, which is made of 5 elements- (i)a receptor- a sensory organ, like an eye, ear, tongue or touch corpuscle (ii)sensory neuron, (iii)a coordinator neuron, (iv) a motor neuron and (v)an effector which normally is a muscle-either involuntary smooth or voluntary striped muscle. A receptor receives the stimulus, a sensory neuron carries the impulse in the form of an electric impulse, a coordinator neuron takes the necessary suitable action, a motor neuron carries the decision to the effector and finally the effector brings out suitable response. Lower animals lack an organized nervous system, but still the mechanism is more or less similar.
Do neurons touch each other?
Not exactly; as an impulse moves from one neuron to another it crosses a small space between the neurons called a synapse. The neurons as said to 'not touch' because the cell MEMBRANES of the two neurons do NOT touch, nor merge, nor consequently is there any sharing of cytoplasm between the two neurons. The two neurons ARE, however, HELD TOGETHER at that synapse by small molecules called SYNAPTIC ADHESION MOLECULES, which protrude FROM each neuron into the synaptic cleft or gap and then stick to one another. In this sense, PARTS of neurons do 'touch' PARTS of other neurons, in a MECHANICAL or structural manner, but NOT in an electrical or signal sense. The neural SIGNAL passes through the synaptic cleft or gap via neurotransmitter chemicals which are released by one neuron, diffuse quickly through the gap, and then stimulate a signal in the receiving neuron.
What carries impulses from the skin to the central nervous system?
A pseudo-unipolar neuron referred to as an afferent neuron carries a sensory impulse to the spinal cord, which is part of the central nervous system.A pseudo-unipolar neuron has one axon which comes from the cell body (soma) and then splits into two branches, the peripheral axonal branch which carries the impulse from the skin, and the central axonal branch which carries the impulse to the spinal cord; it has no dendrites, which distinguishes it from a bipolar neuron.The impulse moves along the peripheral branch and then to the central branch, skipping the soma.
What is affected by parkinson's disease?
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