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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 are the age related changes of the nervous system?
Absolutely. think of a new-born baby - constantly crying and hypersensitive to most things. their nervous system is developing/just developed. Particularly with disease - as this can make you hypersensitive and your nervous system 'on alert' i suppose. :)
What happens when your nervous system breaks down?
When the nervous system breaks down, it can lead to various neurological disorders and symptoms such as muscle weakness, numbness, tingling, memory problems, and difficulty with coordination. Severe breakdowns can result in conditions like stroke, epilepsy, multiple sclerosis, or Alzheimer's disease. Treatment options depend on the underlying cause and may include medication, therapy, or surgery.
Which nervous system division are neurolemmocytes located?
Shwann Cells-PNS
Oligodendrocytes-CNS
Both form the neurolemma
Name three reasons why the nervous system is one of the most important system in the body?
First of all, the nervous system is like the central commanding centre of the body. Your breathing rate, homeostasis, your muscle movement - almost all systemic activities are regualted by the nervous system. When the nervous system gets disconnected from the rest of the body as in the case of a break in the spinal cord (for example), paralysis can occur. This is because the body as a whole needs instructions and these instructions have to be given by some organ/organ system.
Take for example, a simple problem like dehydration. Your blood volume can decrease, which means your blood pressure can fall. When such an event occurs, hormones are secreted via a cascade to allow retention of more quantity of water from the kidney while filtration, allowing your blood volume to come back to some semblance of normalcy.
So, each little environmental or internal event that can hamper the normal functioning of the body is counteracted by the decisions of the nervous system. Even muscular movement, especially involuntary, could not occur without the guidance of the nervous system. As such, the nervous system is the most important system in the body.
How are cells in the body different?
The difference is: every kind of cell has a different job, example: red blood cells have something called "hemoglobin" and it's for absorbing oxygen for the red blood cell to carry around the blood system, while muscle cells are for making you move.
What part of central nervous system link brain and peripheral nervous system?
it is connected because the centeral nervous system sends infor mation to for example move an arm or th do some sort of action in order to respond to a signal triggered by your centeral nervous system- Dr. Park
Do other organisms have ganglia other than worms?
All vertebrates have ganglia of some sort, but there are many different types of ganglia, from dorsal and spinal to autonomic, basal, sympathetic, and other types. Humans have basal ganglia, which makes up a section of the brain.
How many dendrite are in a bipolar neuron?
All the cells in the human body, including the nerve cells, have 46 chromosomes (23 pairs) (except the sperms and egg cells, which have 23 chromosomes each).
Where neuron cell bodies located?
The cell body, called the SOMA, is the main part of the neuron. It is the main metabolic center or region of the neuron.
The neuron has 3 parts: DENDRITES (inputs), SOMA (cell body), and AXON (output). The axon is the part which FIRES when sufficient inputs reach it at the axon hillock.
What behaviour problems can be a result of nervous system damage?
The nervous system can be damaged by trauma, drugs, a whole lot of diseases, or damage to the spine, among other things.
You have thousands of nerves that are part of the PNS.
Divisions of the peripheral nervous system include the afferent (sensory) division and the efferent (motor) division. The nerves coming from all the senses and the nerves going to glands and muscles are included.
The efferent division is divided further into the somatic motor nervous system and the
somatic nervous system which includes all voluntary motor pathways outside the central nervous system.
What are the similarities between the autonomic nervous system and the somatic nervous system?
The two are made up of nerves, and they work together as a system, so together they are said to comprise the overall nervous system.
The Central Nervous System (CNS) is the command center for the body; the Peripheral Nervous System (PNS) provides the CNS with sensory information, and also conveys activation signals to muscles from the CNS to help the organism move and survive.
the brain
How does the skeleltal system help the nervous system?
The skeletal system does many things, the most obvious one almost everything thinks of instantly is support. That is one of the main functions but this system has many more. It is where RBC's (red blood cells) are produced. It's where our body stores most of our calcium, and it regulates the amount of calcium in our body. It gives a ground on which muscles can move, and the big one.. movement, with the aid of muscles of course.
How is the neurotransmitter removed from a synaptic cleft?
Most neurotransmitters are removed by being taken up by the presynaptic or postsynaptic neurones however acetylcholine is the prime exeption to this as is actually destroyed in the synaptic cleft by the enzyme acetylcholinesterase. The reason this must happen is that otherwise the neurotransmitter would be left in the cleft where it would continue to evoke a response in the postsynaptic cell for longer than it should. For this reason reuptake and catabolic enzymes are often the targets of drugs gieven to treat neurological disorders. Another possible problem is wastage, if the neurotransmitter is left in the cleft it may difuse away and be wasted giving the presynaptic neurone more work to do creating more.
What drugs suppress the sympathetic nervous system from working correctly?
Drugs that can suppress the sympathetic nervous system include beta-blockers, which block the effects of adrenaline and noradrenaline on beta-adrenergic receptors, and alpha-blockers, which block the effects of noradrenaline on alpha-adrenergic receptors. These medications are commonly used to treat conditions like hypertension, anxiety, and certain cardiac disorders.
What body system does the nerve cell belong to?
Neurons are the cells that carry impulses in the nervous system. They belong to both the central nervous system (the brain and cord) and the peripheral nervous system. For example, these cells can carry information from your touch receptors in the skin of your fingers to the brain where you interpret it. Perhaps what you touch is very hot. In a flash, the brain sends information back to your muscles so that you will remove the fingers as quickly as possible so you will not burn them.
What is the functional unit of the nervous system?
The nervous system gathers information from the external environment, stores and processes it, and initiates the appropriate responses.
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excuse me, i think he / she wasn't asking about what the nervous system is but what is
The functional unit of the nervous system is the neuron.
What can be found in brain and nervous tissue?
Yes. The brain is composed of two kinds of nerve cells neurons (which are either afferent, interneurons, or efferent) and neuroglia (which has several subtypes).
What are the major components of the central nervous system and the peripheral nervous system?
CNS = central nervous system (brain and spinal cord)
PNS = peripheral nervous system (that part of the nervous system that extends outside the central nervous system)
What are the types of indicators used in titration reaction labs?
Indicator ______________Color change ___________pH at end point
Methyl orange____________orange ---> yellow_______ 3.7
Litmus__________________ red ---> blue___________ 6.5
Bromothylmol blue ________yelow --->blue___________7
Phenolphthalein___________Colorless---> pink________9.1
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'.
Why is the parasympathetic nervous system important?
autonomic
The parasympathetic nervous system is part of the nervous system.
The central nervous system is the control center of the body. It includes the brain and spinal cord.
There are three main regions of the brain that receive and process information: the cerebrum, the cerebellum, and the brain stem. The spinal cord is the link between your brain and the peripheral nervous system.
The second division of the nervous system is the peripheral nervous system.The peripheral nervous system consists of a network of nerves that branch out from the central nervous system and connect it to the rest of the body. The peripheral nervous system is involved in both involuntary and voluntary actions.
The most common type of neuron found in the central nervous?
The most common type of neuron found in the central nervous system is the multipolar neuron. These neurons have many dendrites and a single axon extending from the cell body. Multipolar neurons are involved in processing and transmitting information in the brain and spinal cord.
