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What is the minimum number of neurons required to carry information from a sensory receptor to the somatosensory cortex?
At least three neurons are required to carry information from a sensory receptor to the somatosensory cortex. The first neuron is located in the sensory receptor, the second neuron is in the spinal cord or brainstem, and the third neuron is in the thalamus before reaching the somatosensory cortex.
Incoming messages are first detected by what part of a neuron?
Incoming messages are first detected by the dendrites of a neuron, which receive signals from other neurons or sensory receptors.
When you touch a warm plate of food being handed around the dinner table the first type of neuron to be activated is?
Sensory.
WhatConversion of a stimulus into a generator potential is?
Receptor potential, a type of graded potential, is the transmembrane potential difference of a sensory receptor. A receptor potential is often produced by sensory transduction. It is generally a depolarizing event resulting from inward current flow. The influx of current will often bring the membrane potential of the sensory receptor towards the threshold for triggering an action potential. A receptor potential is a form of graded potential, as is a generator potential. It arises when the receptors of a stimulus are separate cells. An example of this is in a taste bud, where taste is converted into an electrical signal sent to the brain. When stimulated the taste bud triggers the release of neurotransmitter through exocytosis of synaptic vesicles from the presynaptic membrane. The neurotransmitter molecules diffuse across the synaptic cleft to the postsynaptic membrane. A postsynaptic potential is then produced in the first order neuron, and if the stimulus is strong enough to reach threshold this may generate an action potential which may propagate along the axon into the central nervous system
Cell body for first order neuron located here?
The cell body of the first-order neuron is typically located in the dorsal root ganglion (also known as the spinal or sensory ganglion) of the spinal cord. From there, it sends signals to the spinal cord or directly to the brain, depending on the type of sensory information it is transmitting.
What is the minimum number of neurons required to carry information from a sensory receptor to the somatosensory cortex?
At least three neurons are required to carry information from a sensory receptor to the somatosensory cortex. The first neuron is located in the sensory receptor, the second neuron is in the spinal cord or brainstem, and the third neuron is in the thalamus before reaching the somatosensory cortex.
What are the first and last elements in a spinal reflex?
The first element in a spinal reflex is the sensory receptor, which detects a stimulus. The last element is the effector, which carries out a response to the stimulus.
Is the sensory receptor the first element in the sensory pathway?
Yes the sensory receptor is the first element.
What is an example of sensory neurons?
An example of afferent neuron would be using a sense. In this case we will choose touch or feel. EX: Your Hammering the door and suddenly u smash a finger. First it started with a smash then that feeling passes through your sensory nerves which pass through your whole body ending at the brain which makes u feel pain. That is an afferent neuron experience.
Describe the path an impulse would take for a reflex reaction?
When a sensory receptor detects a stimulus, an impulse is transmitted via a sensory neuron to the spinal cord. In the spinal cord, the impulse is processed and a response is generated, which is then sent via a motor neuron to the effector (muscle or gland) to carry out the reflex reaction. This entire pathway occurs rapidly and automatically without involvement of the brain.
Where do first order sensory neuron axons reside?
In a ganglion.
What is the sequence of events in a typical reflex arc?
receptor detects a stimulus - change in the environmentsensory neurone sends signal to relay neuronemotor neurone sends signal to effectoreffector produces a response
First order sensory neurons?
First order sensory neurons begin in the receptor, travel to dorsal/posterior gray horn of the spinal cord where they synapse with the second order sensory neurons.
Incoming messages are first detected by what part of a neuron?
Incoming messages are first detected by the dendrites of a neuron, which receive signals from other neurons or sensory receptors.
When you touch something hot, a neuron in your finger senses the temperature. Which happens first?
an action potential moves along the neuron
First step in a reflex arc?
A reflex arc involves the following components:The receptor is the part of the neuron (usually a dendrite) that detects a stimulus.The sensory neuron transmits the impulse to the spinal cord.The integration center involves one synapse (monosynaptic reflex arc) or two or more synapses (polysynaptic reflex arc) in the gray matter of the spinal cord.A motor neuron transmits a nerve impulse from the spinal cord to a peripheral region.An effector is a muscle or gland that receives the impulse from the motor neuron. In somatic reflexes, the effector is skeletal muscle. In autonomic (visceral) reflexes, the effector is smooth or cardiac muscle, or a gland.
When you touch a warm plate of food being handed around the dinner table the first type of neuron to be activated is?
Sensory.
