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Parent Category: Biology
Any of the sciences that deal with the functions of the human nervous system and brain -- perception, memory, consciousness and learning.
Sensory neurons - (touch, odor, taste, sound and vision) a re arenerve cells that transmit sensory information . They areactivated by sensory input, and send projections to other elementsof the nervous system, ultimately conveying sensory information tothe brain or spinal cord. Interneurons -...
During depolarization, sodium (Na) rushes into the neuron throughNa channels (at the Nodes of Ranvier between the bundles of myelin"insulation"). Less Na in the extracellular fluid would mean therewould be less to rush in. So, the neuron would not be depolarizedas well. The resting membrane...
In simple terms - communication . Nerve cells, or 'neurons' are what process sensory information (like sight, sound, taste, smell, touch, pain, hearing, balance). Neurons are also what generate movement commands for muscles; and large collections of neurons working together are what give rise to...
Yes, they do. They have a type of endorphin that is calledleucine-enkephalin.
Artificial nerves, such as may be used in surgical reconstructionof injured limbs is far from primitive. They are usually composedof microscopic wires and microchips, but you should really ask aHUMAN doctor about this. I specialize in ANIMAL LIFE.
Bring microbes and turn into a source for the production of nitrogen
They have Branches like a tree so that they can communicate betterwith other neurons. The more connections the more information thatcan be transmitted at that moment.
Burning pain is legs are common because of continuous workout aftera long time. This burning sensation is often at the top part of your thigh .This pain could sometimes be unbearable and the most easiest andlikely to relieve the pain is by keeping an ice pack. or running absolutely hot water on the...
Myelin sheath , comprised of glial cells wrapped around an axon one after another (oligodendrocytes in the CNS, schwann cells in the PNS).
Yes, endorphins are brain chemicals known as neurotransmitters.They transmit electrical signals within the nervous system.
The action potentialhas three different stages-depolarization, hperpolarization andrepolarization. Depolarization iscalled the rising phase when positively charged sodium ionssuddenly rush through open voltage-gated sodium channels into aneuron. Hyperpolarizationis the phase where potassium...
The axon of some neurons can be a long, thin structure, wrapped by a myelin sheath to help it convey an impulse quickly over long distances and retain its strength (saltatory conduction).
unipolar bipolar multipolar anaxonic
In my opinon it would be Micro Naps, Narcolepsy, and sleepwalking. (I suffer all of these due to constant NightTerrors.) MicroNaps- You fall asleep with out warning or control. Only last about a minute. You confuse reality and your dreams big time. Dangerous if your driving or operating machinery. ...
The peristaltic movements are muscle contractions and its functionon the esophagus is to push food down into the stomach and preventit from going back into the esophagus.
The little substances go through the blood-brain barrier. Insulinpicks up glucose in the bloodstream and assists the glucose to passthrough the cell membrane in any body area.
Dobutamine is a drug that acts on the sympathetic nervous system. Physicians use it to treat heart failure and cardiogenic shock. Dopamine is a neurotransmitter that our bodies produce in order to send signals between brain cells.
Hyperpolarization means that the membrane potential becames more negative than the resting potential. This means that it is more difficult for an action potential to be triggered at the postsynaptic membrane. This occurs at inhibitory synapses. Hyperpolarization can be achieved by increasing the...
Well, the evolution of a complex nervous system makes it possible for "various animal species" to have advanced perception abilities like sight, smell, hearing, touch, and taste.
One way of increasing levels of dopamine in the brain is through the inhalation or digestion of marijuana. Dopamine is a chemical produced in the brain that is responsible for feelings of euphoria and reward. Very frequent use of marijuana can cause the brain to temporarily lose its ability to...
Impulses that travel along myelinated neurons are the fastest.
Opening of sodium channels and the fact that potassium channels arestill closed leads to rapid depolarization that may lead to theneuron firing.
You will need to use 2 auto injectors for self aid in a nerve agent emergency; they should be labelled 1 & 2. If you are administering buddy care, use up to 3 sets of auto injectors in addition to the CANA auto injector.
The Circle of Willis is a circle of arteries that provides main blood supply to the brain and the surrounding structures. It is important as prevents ischemia(shortage of blood to tissues) thus preserving cerebral perfusion when one or more artery in the brain is blocked due to throbosis or...
\nYes. And fatigue is likely to be a long term problem if the person was in a coma due to head trauma or a stroke.
It is called moyamoya and it an extremely rare genetic condition.
There is a greater concentration of NA+ outside of the cell and a greater concentration of Potassium inside of the cell
S. Weir Mitchell (1829-1914) JMC Class of 1850 Answer 2 Jane Martin Charcot see link below.
A seizure is caused by excessive electrical activity in the brain. A transient ischaemic attack is due to a problem in the blood supply to the brain. They are two very different kinds of problems. A seizure would not cause a problem in the blood supply to the brain and so it would not cause a TIA.
Dopamine is an important neurotransmitter that is produced by thebrain. It is responsible for alertness and motor function, so it isgood to have enough quantities early in the day. One of the thingsthat can improve the release of dopamine is to have a high proteinbreakfast. That would mean things...
it is about 4 microns to 100 microns in diameter
neuron = cell body + dendrites + axons nerve = axon + schwann cells (peripheral nervous system only) equivalent term of nerve in the central nervous system is called tracts neuron is a type of cell nerve is an anatomical term
Myelin sheath. This is the insulating sheath which covers most of the axon, between the Axon Hillock and Collateral branches of the Neuron.
The 2 neuron pathway is the most simple nervous system pathway.Spinal and cranial nerves are the major nerves in the nervoussystem.
Yes, indeed a person can die from this. But than again, it is highly unlikely a person will lose enough CSF to die, it usually patches off and stops draining. Now the CSF can cause pressure in the brain and it can cause death. That's the only way I know of that has to do with csf and dying So more...
Any board certfied Medical Doctor should be able to prescribe physchiatric drugs. However the reason physchiatrists exist is because they can better diagnose and treat psychological issues.
Brain cells begin to die if oxygen levels are very low for four minutes or longer, and after five minutes permanent anoxic brain injury can occur. So anything up until 3 minutes is fine.
Obviously. Followed by a MBBS degree + MD/MS +furtherspecialisations
For instance, the plasma membrane of a skeletal muscle fiber is called the sarcolemma, and the cytoplasm of the muscle fiber is called the sarcoplasm.
You use your brain to help you do math. You need to use it to think about a math problem.
it is the most important part of the cell ... it is the brain or control centre of the cell
Serious complications from an MVD include Death (.1%), Stroke (1%), Hearing loss (3%) and facial weakness (.5%). Other complications include leakage of spinal fluid and wound infection (1%). Most patients will have transient neck pain and stiffness from the surgical incision and from seeding of the...
In myelinated axons, the voltage gated sodium ions are located along the nodes of Ranvier, the exposed places between the myelin segments. The gates here, however, are not particularly more concentrated than on other un-myelinated axons. TRUE
The endoderm and ectoderm
Neurons are grouped structurally according to the number of processes extending from their cell body.
The different ion concentrations on the inside and outside of the cell membrane create a certain electric potential around the cell (just by being there with their charge). A strong enough change in the concentrations can cause certain ion channel proteins in the membrane to open all at once,...
Dopamine is commonly referred to when discussing the rewards system of the brain. This neurotransmitter is responsible for acting as the system for the brain. Thus when extra dopamine is released during drug usage, it causes a positive association with the drug to be formed. In short: More dopamine...
The symptoms you describe sound like a seizure or fit. This may be caused by epilepsy, a head injury, drug (mis)use, excess alcohol, stress, sleep deprivation or poisoning amongst other things. EMERGENCY ASSISTANCE SHOULD BE SOUGHT IN THE FOLLOWING CIRCUMSTANCES : . The seizure lasts for...
The presence of an enzyme called acetylcholinesterase that degrades acetylcholine is what prevents an accumulation of the neurotransmitter and sustained muscle contraction. Acetylcholinesterase is an enzyme that can be found within the neuromuscular junction. Thus, when a nerve impulse causes the...
Of course they can. Just because you're using one half of your brain doesn't mean you can't use the other. You might have trouble focusing on math because you're most likely inclined to be more interested in the music.
The endocrine system has no direct role in? A. Sexual B. Sensory perception C. Metabolism D. Composition of blood and bones
Tricyclic are a family of antidepressants that were given to people before the SSRI. Often psychiatrists prescribe a tricyclic and a newer anti-depressant usually a selective serotonin Inhibitor or a serotonin Norefenefphan selective inhibitor. Your doctor can usual decide what is safe
Association neurons, also known as interneurons, connect sensory (afferent) neurons to motor (efferent) neurons.
The entire brainstem is required for life.
Seizures due to fever are common in children. However, the cause of fever should be investigated to avoid repeat febrile seizures.
Dopamine is neurotransmitter produced naturally by the brain's pleasure and reward center (limbic system). Dopamine is produced natural when u are eating ice cream, exercising or watching your favorite movie. What illegal drugs or antidepressants do is that they cause an abnormal production of...
There is no specific lowest level of metabolism.
It blocks the receptors for acetylcholine, so the nerve cellscannot receive the signal to generate an action potential.
Dopamine is involved in the brain's reward and pleasure centers.
I think it is blood donated from blood type AB or 0
When a signal is sent out from the nervous system it is caused a release of a neurotransmitter that releases an action potential.
You can see them at Wikipedia. Just type 'neuron'
Dopamine is an " award " neurotransmitter, so abuse of drugs could be linked to dopamine.
\nThey are not prone to this illness but its not impossible\nif ur dog has a seizure got straight to te vet
No, plants are biotic factors. They are living organisms.
A nerve is crushed between the two recording electrodes.
i have the same crossword right in front of me! its demyelinated
Soy lecithin is not, itself, a phytoestrogen. However, soy does contain phytoestrogen compounds.
Examples would be 1) intractable headaches, 2) seizures, 3) movement disorders, such as Parkinson's or Huntington's Disease, 4) demyelinating disorders, such as multiple sclerosis, and others; and many, many more.