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Nerves
Nerves are thread-like structures that form a network of pathways that transmit information from the brain to the body and the body to the brain, in the form of electrical impulses.
1,605 Questions
What part of neuron that receive a signals from other neurons?
Yes. They interact with each other via chemical "signals" called neurotransmitters and neuropeptides. In this way, a neuron sends an excitatory (stimulating) or inhibitory (destimulating) signal to another neuron to cause it to generate a nerve impulse or prevent it from generating one, respectively.
When the nerve impulse encounters a myelin-covered section of neuron?
When the nerve impulse encounters a myelin-covered section of a neuron, it jumps between the nodes of Ranvier, allowing for faster transmission speed due to saltatory conduction. Myelin acts as an insulator, preventing the impulse from dissipating and increasing the efficiency of signal transmission along the neuron.
What is the location for sensory neurons?
They can be found in the dorsal root ganglia, retina, peripheral vestibular organs, cochlea, and enteric nervous system. Then there are second order sensory neurons in the brain that form the basis of the 'sensory homonculus'.
How many neurons does the cerebellum have?
How many neurons does the cerebellum have?
This is an interesting question. Of the sources I have reviewed thus far, I have not found a consistent approximation of neurons in the cerebellum.
The human brain has (estimate) 100 billion neurons. Some sources say 10-100 billion. According to Wikipedia, the cerebellum takes up 10% of the brain's total volume and contains roughly 50% of all the neurons in the brain. In that case, 50 billion neurons in the cerebellum.
However, in the book I'm currently reading, it has suggested that the cerebellum neuron count is more like 70 billion. Therefore, the cerebrum (rest of the brain) has the remaining 30%.
Interesting isn't it? Such a small structure contains majority of the brain's neurons. Additionally, the cerebellum has Purkinje cells, which are among the largest neurons in the brain. According to Wikipedia, Granule cells (very tiny neurons) are very numerous in the cerebellum which are accountable for the mass % of neurons in this particular cortex.
Hope I have helped you! However, take note that to some people Wikipedia is not a valid source. To me it's reliable in some circumstances. The book I'm reading now was written by an M.D so I feel that is more reliable, so I'll go ahead and say that the cerebellum has (estimate) 60-70 billion neurons.
What is released from an axonal nerve ending?
Chemicals called neurotransmitters are employed in the relay, amplification, and modulation of electrical impulses between neuronal cells. Vesicles found at the pre-synaptic knob of axon terminals discharge them.
What does a sensory neurons do?
Sensory neurons are nerves that take in information from either the outside world, or from within the body itself. Sensory neurons communicate this information to the brain which then issues a response. Sensory nerves take in and communicate information about heat, cold, pressure, pain, position and more.
detect, feel, and smell
Why is the resting membrane potential the same in both the sensory neuron and the interneuron?
Because it didnt have a stimulus to activate depolarization
Open loop fault during idle on a hyundai.what does that mean?
Means the PCM has detected a fault with the closed loop system, and is operating in open loop fault.
Open loop is a program that the PCM runs during start up, and continues to run until the PCM decides the o2 sensor is hot enough to be relied on for fuel control.
closed loop runs relies on the o2 sensor for fuel control.
open loop fault happens when an error is reported.
look for O2 sensor DTCs.
myelin
What signal does a rise in prices send to producers?
in class room economic: make more
in real world economics: flood the market and raise prices
The speed of light is faster than the speed of a nerve message, speed of electricity, and speed of sound. The speed of light in a vacuum is approximately 186,282 miles per second, while nerve impulses, electricity, and sound waves travel much slower.
What is neurotransmitter tone?
Tone denotes the concentration of neurotransmitter within a given region of the nervous system. A lot of glutamate indicates a high excitatory, glutamatergic tone.
Nerves are formed in a late stage of development, when some of the cells composing the nerve cord and the brain send out long fibers bound together in bundles (nerves).
Why is it important for biopsychologist to understand neural conduction and synaptic transmission?
if u know, tell me please!!! im doing the same assignment too :P if u know, tell me please!!! im doing the same assignment too :P
Synaptic delay is the period of time for neurotransmitter chemicals released from the axon terminus of the sending neuron to cross the synaptic gap by diffusion and attach to matching receptors on the receiving neuron, initiating a reaction (either stimulatory or inhibitory) in that neuron.
Are monoamines the only neurotransmitters found between motor neurons and voluntary muscles?
No, that would be Acetylcholine
