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Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
What is the boss of the nervous system?
Well, if the "boss" you are referring to is the main part, then the Brain.
How does the four major elements of a simple nervous pathway function during pain withdrawal reflex?
During a pain withdrawal reflex impulses are sent through different nerves and to the spinal cord. This reflex does not make it to the brain but only to the spinal cord. We call this involuntary action because we dont control reflexes. The sensory neurons are the first to recieve the impulse, then they travel to the interneurons, or associative neurons, and then they go to the motor neurons which carries the impulse to the central nervous system. Then the effector is the response, so in this case your musscle will contract.
What natural supplements stimulate the sympathetic nervous system?
Caffeine works through similar pathways to adrenergic agonists, and has similar effects (heart rate, blood pressure increase). This is why the normal recommendation for hypertensive patients is (in part) to reduce caffeine intake.
Do action potential transmission is faster in myelinated neurons?
TRUE. Neurons with myelin (or myelinated neurons) conduct impulses much faster than those without myelin.
How does a message travel through a single neuron?
When a message gets sent to a neuron from the dendrite it goes through the cell body to the tip of the dendrite where it leaps to the next dendrite.
These compounds are called endorphins.
How does the skull cooperate with other organs in the nervous system?
No.The skull is the structure in your head that protects your brain. Your skull is a bone, and bones are part of the Skeletal System. The Skeletal System is made up of all the bones in your body, and it helps your body move, it protects your vital organs, and it gives you form so you are not a blob of body tissue.
Your nervous systems is made up of the brain, spinal cord, and the network of nerves throughout your body.
Which neurotransmitter is released into the heart by the vagus nerves that slow the heart?
The parasympathetic division of the autonomic innervation of the heart releases acetylcholine from its varicosities (the sites where neurotransmitter is released).
The acetylcholine binds to M-2 muscarinc receptors to mediate the negative chronotropic (slowing of heart rate) effect. This also mediates a negative inotropic (lowering of force of contraction) effect.
That depends on what kind of 'channels' you're talking about. There are many different kinds of channels. You must elaborate.
How many butt cords in a cord of wood?
I believe it would depend A: the size of the butt, B: the type of wood, and C: whether or not it's raining outside.
Where is acetycholine broken down into acetate and choline?
Acetycholine is broken down into acetate and choline in the synaptic cleft.
Skills that are encountered everyday life that depend on the nervous system?
driving, bending, speech, and processing information.
Cleans up chemicals released by nerve cells?
AchE Acetylcholinesterase. It cleans up Ach Acetylcholine
What is the relay center for sensory impulses?
The thalamus is the main relay station for all sensory impulses going to the cortex of the brain, except olfactory sensations. Afferent nerve fibers come into the thalamus, which sends the signals on to the correct part of the cerebral cortex for processing. This is a large, oval structure located on either side of the third ventricle of the brain.
What 2 groups is the perpheral nervous system divided into?
If I remember correctly, there is of course the central nervous system and the peripheral nervous system, further divided into the sympathetic and the parasympathetic nervous systems.
