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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
Movement centers of the brain are responsible for your hand going up. If it's your right hand, the left brain is responsible and if it's your left hand, the right brain is responsible.
Why are your eyes ears and nose located in your head?
it would be weird smelling or hearing or tasting from any other part of your body and god just put it right there because thats where it looks right
acetycholine
How is a resting potential achieved in the nervous system?
The resting nerve cell is not being stimulated to send a nerve impulse
Why can't we control our heart beat like limb movement?
While most of us are unaware of our heart beat which is under control of the "autonomic" part of our nervous system, some people can learn to control the heartbeat. For instance rifle marksmen can stop their hearts for a time while they shoot so as not to shake the gun.
What are the two kinds of nervous systems?
The two kinds of nervous systems are sympathetic and parasympathetic.
P.S. The two parts of the nervous system are Central and Peripheral.
What substance is found in synaptic vesicles of the axon terminal?
Neurotransmitters are special chemicals that are produced and stored in synaptic vesicles. There are many different kinds and each vesicle can hold hundreds of them. When they are released, they cross the synaptic cleft and attach to a receptor site which may be on another nerve cell, a muscle cell, or a gland.
What is autonomic dysfunction?
Dysfunction of the autonomic nervous system (ANS) is known as dysautonomia. The autonomic nervous system regulates unconscious body functions.
Serotonin
Does action potential involve the influx of negative ions to depolarize the membrane?
No. The negative ions stay within the cell (neuron).
An action potential begins (rising phase) with an influx of sodium, a positive ion or cation. The rising phase ends (falling phase) with an efflux of positive ions (potassium). The membrane potential is stabilized again with the action of the ATP dependent sodium-potassium pump.
What are the cranial nerves involved in the corneal reflex?
It is the 7th cranial nerve (facial nerve).
A basal ganglion is any of a group of nuclei in the brain interconnected with the cerebral cortex, the thalamus and the brainstem.
What does autonomic nervous system control?
It controls involuntary actions such as heart rate, digestion, respiration rate, salivation, perspiration, sexual arousal, and urination.
What is your Body is organized into that works together to keep you alive and healthy?
cells, tissues, and organ systems
How do schwann cells in the peripheral nervous system repair damaged nerves?
forminga cellular cord that directs axonal regrowth.
Oligodendrocyte
Cranial nerve examination II-XII is wholly unremarkable?
That means all of the nerves are working like they are supposed to. It is normal.
