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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 physiological reason for the period of electrical recovery experienced each cycle?
This is when the cell returns to a polarised state after being hyperpolarised following depolarisation. The period of recovery or refraction is due to the electrolytes being balanced again e.g. Na+ and K+.
They are called as motor neurons.
Where does sensory input come from?
Comes from the brain cords, they help your brain cells in order to live
Karl Lashley was experimenting with removing parts of a mouse's brain to which how it affected its path around a maze. He did not find anything, but it inspired an area of study called Behavioral Neuroscience.
What hooks the muscles to the bones?
the thing that "hooks" the muscles to the bones is called tendons
What is the treatment for cortical atrophy of the brain?
There is no treatment for cortical atrophy of the brain; just support and nursing care.
How does the sense organs interact with the central nervous system?
Senses, such as hearing, taste, sight and smell, are transmitted by the spinal cord to the brain for interpretation. The brain and the spinal cord are the two main parts of the central nervous system.
DIvision of the nervous system brings sensory information to the central nervous system?
The afferent neurones or Sensory neurones. Further divided to 2 subtypes, the visceral (from inner organs) and somatic (from skin). There is also the cranial nerves which provide information to the CNS.
What does extrapyramidal mean?
relating to or denoting nerves concerned with motor activity that descend from the cortex to the spine and are not part of the pyramidal system.
What is a painful condition of the nerves of the hands and feet?
One painful condition of the nerves of the hands and feet is peripheral neuropathy.
What part of the nervous system stimulates the arrector pili muscles and give you goosebumps?
Each arrector pili is composed of a bundle of smooth muscle fibres which attach to several follicles (a follicular unit), and is innervated by the sympathetic branch of the autonomic nervous system. The contraction of the muscle is therefore involuntary - stresses such as cold, fear etc. may stimulate the sympathetic nervous system and thus cause contraction, but the muscle is not under conscious control.
How impulses are transmitted and generated?
the brain sends electrical shocks through our nervous system that tells our body how to move, and when to do it.
What is an example of the nervous system helping your body to maintain steady conditions?
The nervous system helps keep steady body conditions by telling the body how to respond to the information it gets. For example when you are hungry, your nervous system tells you to eat. This action maintains steady body conditions by giving your body the nutrients and energy it needs.
Does the decision-making function of the nervous system take place in the CNS?
Yes. The CNS is in the brain and spinal cord.
What is the insulating material found around a neuron?
myelin, although it is really only around the AXON of the neuron, not the whole neuron.
