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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
The relationship between central nervous system and pns?
The central nervous system is like the command center, while the peripheral nervous system is like the communication center between the organs of the body and the CNS and visa versa.
What is the relationship between nerve size and conduction velocity?
velocity proportional to square root of diameter
What part of your nervous system allows you to speed up your body when you need energy?
There are two parts of the autonomic nervous system-the sympathetic and the parasympathetic. The sympathetic nervous system initiates the fight-or-flight response, which increases heart rate, blood pressure, and cardiac output.
Are spinal nerves grouped and named according to their function?
They are numbered by the level on spinal cord: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal.
What part of the brain contains nerve centers which help control eye movement?
the neuron that controls our eye movement and it ism important
How does the sympathetic nervous system act?
The autonomic nervous system that controls the functions within the body. Some functions that it controls are the heartbeat, digestive system, and breathing. The autonomic nervous system is the part of the peripheral nervous system that acts as a control system. It functions largely below the level of consciousness to control visceral functions.
Why is the formation of nerve plexuses a survival advantage?
Damage to a single spinal nerve will not completely paralyze a limb.
What is released when an impulse reaches the end of a neuron?
The impulse ends in the terminal or synaptic knob. Here neurotransmitters are put in vesicles and travel across the synaptic cleft to the next neuron.
What is the difference between a human nervous system and a jellyfish nervous system?
A human nervous system is much more complex. Unlike a human a jellyfish does not have a central nervous system.
Where is the olfactory nerve located?
Since olfactory refers to the sense of smell, the olfactory nerve would be located in the nose, or nasal cavity.
What is the drug that increases the activity of the central nervous system is known as?
q-1 difference plate & block like
When you are scared which nervous system does it triger?
If you are startled, and in the "flight or fight" mode, the sympathetic autonomic nervous system is active, which will cut of digestion, increase heartrate, dilate pupils, etc.
Are your arms and legs parts of your central nervous system?
They belong to the peripheral nervous system, as opposed to the central nervous system (as they are to be found on the periphery of the body).
How does poor nutrition effect the circulatory system?
It puts a strain on the heart because of all the extra miles of blood vessels it has to pump through.
What does vagal nerve stimulation do?
The vagal nerve stimulator has two parts: an electrode that wraps around the left vagus nerve in the neck; and a pulse generator, which is implanted under the skin below the collarbone. The two parts are connected by a wire.
What type of neuron carries information to muscles and glands?
It is a set of nerves called the Motor Nerves that deliver signals to the muscles.
Difference between sensory and motor nerve?
Sensory neurons have their cell bodies in the dorsal ganglion at the one or two segemental levels from the dendrite entry. They make a synapse onto interneurons in spinal cord. Motor neurons have their cell bodies in the spinal cord.
What is the substance released at axon terminals?
The substance that is released at an axonal ending to propagate the nerve impulse to the next nerve or muscle is called
