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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.
What is the stimulus and response pathway?
The stimulus and response pathway involves the process by which an organism detects a stimulus and then responds to it. This begins with sensory receptors detecting a change in the environment (the stimulus), which sends signals through sensory neurons to the central nervous system. The brain processes this information and generates a response, which is transmitted through motor neurons to effectors, such as muscles or glands, resulting in a physical reaction. This pathway is essential for survival, enabling organisms to adapt to their surroundings.
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.
Do sensory receptors change voltage at membrane?
Yes, sensory receptors change voltage at their membranes in response to stimuli. When a sensory stimulus is detected, it causes the opening of ion channels, leading to a change in the membrane potential, often resulting in depolarization. This change in voltage can generate an action potential or a graded potential, depending on the type of sensory receptor and the strength of the stimulus. Ultimately, this electrical change is crucial for transmitting sensory information to the nervous system.
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
