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A nerve can carry signals both to the brain and from the brain Why can't an individual neuron do this?
Two basic reasons explain why neurons can't be a two-way street, one anatomical (relating to structure) and one physiological (relating to function). Several other factors would make it impractical to have a two-way street even if it were possible.
Cellular Anatomy: A single neuron may have several dendrites (which receive signals) but has one axon (which transmits a signal). Dendrites transmit a signal to the cell body and axons from the cell body, making the electrical pathway a one-way street. Because a cell only has one axon that only goes one way, the body needs parallel neurons running in different directions.
Physiology: This explanation explains why a cell is a one-way street. The electric signal (or action potential, in cellular Biology jargon) travels from the dendrite to the body of the neuron, which shoots the action potential strait up the axon. The body of the neuron basically confines itself to making the machinery needed to keep the road open and does not have an ability to alter the signal. It doesn't know which dendrite received the signal (this can be seen in the radiating pain that makes heart attacks seem like arm pain) and couldn't choose an axon.
Of course, there's more complicated explanations as well. Different neurons serve different purposes, some detect temperature, some pressure, some help you relax and "rest and digest" while others start the "fight and flight" response, some tell your digestive tract what to do. Where a neuron needs to give an order to a muscle is different than where it's best to sense something, and some senses are best right on the surface of the skin and others deeper in the skin and yet others on or withing muscles and organs.
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Sensory neuron is to motor neuron as?
Sensory neuron is to motor neuron...as feedback system is to control system. The motor neurons send signals from the brain to control the body. The sensory neurons send signals from the body back to the brain.
What part of the neuron would be responsible for notifing the brain that you hurt yourself?
The sensory neurons in your peripheral nervous system are responsible for detecting pain signals from your body and transmitting them to your brain. These neurons are equipped with specialized receptors that respond to stimuli like temperature, pressure, and tissue damage, sending electrical signals along nerve pathways to your brain to signal pain.
Neuron that brings information from senses to brain?
There are 2 different kinds of neurons within the body. The neurons that carry messages from senses to the brain are called Sensory Neurons while the neurons that cause the brain to make the body react are called Motor, or efferent, neurons.
What carries impulse toward the cell body of a neuron?
Dendrites carry impulses toward the cell body of a neuron. They receive signals from other neurons and transmit those signals to the cell body for processing.
Where do motor neurons carry signals from?
The entire signal travels in the neuron by a graded potential which is created in the dendrites and the body (soma) of the neuron, then it reaches a spot of the neuron which is called the axon-hillock where the signal now for the first time has encountered "voltage-gated channels" and now can create an Action potential that can propagate through the terminus of the neuron which is the length of the axon.
Sensory neuron is to motor neuron as?
Sensory neuron is to motor neuron...as feedback system is to control system. The motor neurons send signals from the brain to control the body. The sensory neurons send signals from the body back to the brain.
What part of the neuron would be responsible for notifing the brain that you hurt yourself?
The sensory neurons in your peripheral nervous system are responsible for detecting pain signals from your body and transmitting them to your brain. These neurons are equipped with specialized receptors that respond to stimuli like temperature, pressure, and tissue damage, sending electrical signals along nerve pathways to your brain to signal pain.
What is an efferent neuron?
A motor neuron is an efferent neuron as it 'sends out' a signal as opposed to sensory nerves which are afferent and relay information from the periphery towards the central nervous system.
What is the purpose of neurotransmitters-?
A neuron is a cell that is in the brain and it contains neurotransmitters. They are released from one neuron in order to send a message to another cell.
Cells that relay information gained from the environment to the brain are called?
Sensory neurons are responsible for relaying information from the environment to the brain. These neurons carry signals from sensory organs such as the eyes, ears, skin, and taste buds to the brain for processing and interpretation.
What part of the nervous system does sensory neuron carry impulses?
brain or spinal cord
What part of the neuron carry the image of the object from your eyes to the brain?
nucleus
Neuron that brings information from senses to brain?
There are 2 different kinds of neurons within the body. The neurons that carry messages from senses to the brain are called Sensory Neurons while the neurons that cause the brain to make the body react are called Motor, or efferent, neurons.
Where is the neuron cell in the human body?
Within the nervous system. The brain is obviously packed full of them, whilst the spinal cord and all extending peripheral branches are a network of nerve cells to carry signals between the brain and body.
What are neurons that carry impulses towards the spinal cord and brain?
An Efferent Neuron.
What carries impulse toward the cell body of a neuron?
Dendrites carry impulses toward the cell body of a neuron. They receive signals from other neurons and transmit those signals to the cell body for processing.
What is a synapse in a simple reflex action?
A synapse in a simple reflex action is a junction between two neurons where signals are transmitted. In a reflex action, when a stimulus triggers a sensory neuron, it sends a signal across a synapse to a motor neuron, which then causes a rapid response from a muscle or gland.
