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What are the special characteristic of neurons?
Neurons are specialized cells in the nervous system that transmit electrical and chemical signals. They possess unique structures like dendrites to receive signals, axons to transmit signals, and synapses to communicate with other neurons. Neurons also exhibit plasticity, enabling them to change and adapt in response to environmental stimuli.
What would be the cause of a change in afferent and efferent?
A change in afferent pathways could be due to damage or dysfunction in sensory receptors, nerves, or pathways. A change in efferent pathways could be caused by issues in motor neurons or the neuromuscular junction. Both types of changes can result in altered sensory perception or impaired motor function.
What is the connection between sensory nerves and the neurons in the brain?
Both use neurones which transmit in via action potential and synaptic transmission. Sensory neurones include pain neurones which enter directly into the brain, which perceives the stimulus as pain and gives emotional and motor responses accordingly. Sensory neurones also perceive homeostasis, in that they sense stimuli outside physiological norms and change homeostasis in order to rectify the problem. All motor and limbic (emotional) outputs from the brain are stimulated and therefore initiated by sensory neurone inputs. The spine relys information from peripheral sensory neurones to the brain, and is the literal connection between sensory neurones and the brain.
What is affector neurons?
these have one or more receptors that detect change in either the external or internal environment, information that is detected is transmitted as an electrical impulse to the CNS by the affector neuron.
Do some neurons lack an axon and communicate only with adjacent neurons?
If they are neurons they have an axon, some cell types do communicate using gap-junctions. Yes, some complex sensory organs ( in the retina and organ of Corti for example) do not have axons. These cells liberate transmitter from their soma directly onto postsynaptic neurons in proportion to the membrane potential change they experience.
What are the special characteristic of neurons?
Neurons are specialized cells in the nervous system that transmit electrical and chemical signals. They possess unique structures like dendrites to receive signals, axons to transmit signals, and synapses to communicate with other neurons. Neurons also exhibit plasticity, enabling them to change and adapt in response to environmental stimuli.
Nerve messages from motor nerve cells control the actions of muscles?
Yes. Sensory neurons sense a change in the stimulus and alert the interneurons located in the brain which send an impulse to the motor neurons to make the muscle contract.
What would be the cause of a change in afferent and efferent?
A change in afferent pathways could be due to damage or dysfunction in sensory receptors, nerves, or pathways. A change in efferent pathways could be caused by issues in motor neurons or the neuromuscular junction. Both types of changes can result in altered sensory perception or impaired motor function.
What is the connection between sensory nerves and the neurons in the brain?
Both use neurones which transmit in via action potential and synaptic transmission. Sensory neurones include pain neurones which enter directly into the brain, which perceives the stimulus as pain and gives emotional and motor responses accordingly. Sensory neurones also perceive homeostasis, in that they sense stimuli outside physiological norms and change homeostasis in order to rectify the problem. All motor and limbic (emotional) outputs from the brain are stimulated and therefore initiated by sensory neurone inputs. The spine relys information from peripheral sensory neurones to the brain, and is the literal connection between sensory neurones and the brain.
What is affector neurons?
these have one or more receptors that detect change in either the external or internal environment, information that is detected is transmitted as an electrical impulse to the CNS by the affector neuron.
Do some neurons lack an axon and communicate only with adjacent neurons?
If they are neurons they have an axon, some cell types do communicate using gap-junctions. Yes, some complex sensory organs ( in the retina and organ of Corti for example) do not have axons. These cells liberate transmitter from their soma directly onto postsynaptic neurons in proportion to the membrane potential change they experience.
Which sensory neuron is used when you touch something cold?
When you touch something cold, the sensory neurons involved are primarily the A-delta fibers and C fibers. A-delta fibers are responsible for transmitting sharp, immediate sensations of cold and pain, while C fibers carry more prolonged, dull sensations. These neurons send signals to the central nervous system, alerting it to the temperature change. This process enables your body to react appropriately to the cold stimulus.
Are bipolar neurons more abundant in adults than in children?
Bipolar neurons are not necessarily more abundant in adults than in children; rather, their presence is more related to specific functions in the nervous system than to age. These neurons are primarily found in sensory pathways, such as in the retina and olfactory system, and their numbers are relatively stable across different age groups. However, the overall neural architecture and connections can change as a person develops, potentially affecting how these neurons function rather than their abundance.
Where are the generator potentials generated?
Generator potentials are primarily generated in sensory receptors, which are specialized cells located in various parts of the body, such as the skin, muscles, and sensory organs. When these receptors detect a stimulus (like light, sound, or pressure), they undergo a change in membrane potential, creating a generator potential. If this potential reaches a certain threshold, it can trigger an action potential that propagates along sensory neurons to the central nervous system for processing.
Which sequence best describes the change in signals as sensory neurons in the eye respond to an external stimulus?
I think its C for your test.Do you know the answer to this question?Which sequence best describes the change in signals as sensory neurons in the skin responds to a person touching a very cold or hot surface?Temperature → Chemical → SoundTemperature → Electrical → ChemicalElectrical → Light → ChemicalChemical → Sound → Electrical
What is the relationship between a stimulus and a nerve impulse?
The neuron is the functional portion of the central nervous system, carrying impulses to the designated location. Neurons also have the role of interpreting an impulse, and waiting for a response. Neurons fall under the category of sensory neurons, interneurons and motor neurons.
How are neural impulses generated?
Neural impulses are generated when a neuron receives signals from other neurons or sensory receptors, causing a change in its membrane potential. This change in membrane potential triggers an action potential, a rapid electrical signal that travels down the axon of the neuron. This action potential then triggers the release of neurotransmitters at the synapse, allowing the signal to be passed on to other neurons.
