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Neuroscience

Any of the sciences that deal with the functions of the human nervous system and brain -- perception, memory, consciousness and learning.

1,771 Questions

How big is a snails brain?

snails do not have a spinal cord which makes them an invertebrate and thus concludes the snails have no brain.

Corresponds to the period of repolarization of the neuron?

The period of repolarization of a neuron corresponds to the time when potassium ions move out of the neuron, allowing the cell to return to its resting potential. This phase follows the peak of the action potential when sodium channels close and potassium channels open, leading to membrane potential restoration. Repolarization is essential for the neuron to be able to generate subsequent action potentials.

What cell secretes dopamine?

Some sources claim adrenal medulla is responsible. Apparently there are three types of cells in the adrenal medulla: one for epinephrine, norepinephrine, and dopamine respectively.

The hypothalamus also secretes dopamine. More than likely other cells secrete dopamine as well.

Does Asperger's Syndrome affect the brain?

Asperger's Syndrome is a neurodevelopmental disorder that affects the brain's functionality. It is characterized by difficulties in social interaction and nonverbal communication, as well as restricted and repetitive patterns of behavior. However, individuals with Asperger's Syndrome often have average to above-average intelligence and can excel in certain areas due to their unique cognitive abilities.

Can you be a neurologist and a neurosurgeon?

A neurologist is a physician who has completed specialty training in neurology (the study of nerves and the nervous system). Neurologists perform examinations, order various laboratory and diagnostic tests and treat various neurologic disorders with medications. A neurosurgeon is a physician who has completed surgical specialization in neurologic surgery. Neurosurgeons may perform surgery on the brain, spinal cord, vertebral column, peripheral nerves, or may place monitors or drains into the brain or ventricles.

What is the nervous system of a Cephalopod?

Cephalopods are widely regarded as the most intelligent of the invertebrates, and have well developed senses and large brains (larger than those of gastropods). The nervous system of cephalopods is the most complex of the invertebrates and cephalopods is the most complex of the invertebrates and their brain-to-body-mass ratio falls between that of warm- and cold-blooded vertebrates.The brain is protected in a cartilaginous cranium. The giant nerve fibers of the cephalopod mantle have been widely used as experimental material in neurophysiology for many years; their large diameter (due to lack of myelination) makes them relatively easy to study. Cephalopods are social creatures; when isolated from their own kind, they will take to shoaling with fish. Some cephalopods are able to fly through air for distances up to 50 m. While the organisms are not particularly aerodynamic, they achieve these rather impressive ranges by use of jet-propulsion; water continues to be expelled from the funnel while the organism is in flight.

What body function is improved if you sleep on your right side?

Sleeping on your right side can help improve digestion because it allows the stomach to empty more easily and prevents stomach acid from moving up into the esophagus.

What drives one neuron to connect to another?

Neurons connect to each other through specialized junctions called synapses, driven by chemical signals called neurotransmitters. These signals help facilitate communication and information transfer between neurons, allowing for the integration and processing of information in the brain. Cooperation between neurons through synaptic connections is essential for various cognitive functions and behaviors.

What do axons and dendrites belong to?

I'm assuming you're talking about dendrites... And the dendrites are what receive signals on a neuron. Signals are delivered through the axon to the axon terminal, which passes the signal to another neuron's dendrites.

Drug addicts require larger amounts of the drug to create a dopamine flood, or high This effect is known as what?

This effect is known as tolerance, where the body requires increasing amounts of a drug to produce the same effect. It can lead to heightened risk of overdose and other health complications in drug addicts.

Drug addicts require larger amounts of the drug to create a dopamine floodor high This effect is known as what?

Drug tolerance. Over time, as the body becomes accustomed to the drug, higher doses are needed to achieve the same effects.

Why is it so hard to diagnose nervous system disorders?

Diagnosing nervous system disorders can be challenging due to the complexity of the nervous system, the wide range of symptoms and conditions that can arise, and the need for specialized tests like imaging studies, nerve conduction studies, and spinal taps. Symptoms can also vary significantly from person to person, making it harder to identify a specific disorder.

Neurons are classified on the basis of their structure as?

Neurons are classified into different types based on their structure as follows: multipolar neurons with many dendrites and a single axon, bipolar neurons with one dendrite and one axon, and unipolar neurons with a single process extending from the cell body that branches into dendrites and an axon.

What organ of the endocrine system also interacts with the nervous system?

the nervous system and the endocrine system are joined together by the HYPOTHALAMUS. The HYPOTHALAMUS is part of the central nervous system(CNS).I receives,sorts, and interprets signals from neurons. It is also part of the endocrine system and produces hormones.

-JMAR14

What would probably trigger musicogenic epilepsy?

Deep Dubstep.

But also any music that the person likes generally causes some kind of a complex partial seizure.

Other than that high noise motors and other vibrating sources of sound trigger some.

The main symptom of upper motor neuron syndrome is?

The main symptom of upper motor neuron syndrome is spasticity, which is characterized by increased muscle tone and exaggerated reflexes. Other common symptoms include muscle weakness, difficulty with fine motor skills, and impaired voluntary movement.

What is the minimum voltage that give shock to human body?

The minimum voltage required to shock a human body varies depending on factors such as the pathway of the current, duration of exposure, and individual factors. However, in general, a voltage as low as 50 volts can be enough to cause harm or death if the current passes through the body in a way that affects vital organs like the heart.

Period of reploarization of the neuron during which it cannot respond to a second stimulus?

The absolute refractory period. This period occurs after the action potential has been initiated and is a result of inactivation of the sodium channels. These sodium channels would normally open up to allow sodium influx into the cell during an action potential. The absolute refractory period occurs during an ongoing action potential and is the period in which a subsequent action potential absolutely cannot be generated.

This should not be confused with the relative refractory period which occurs immediately following the absolute refractory period (during membrane hyperpolarization). During this period a subsequent action potential is possible, but more difficult to attain.

What activity would require the coordination of both hemispheres of the brain?

Playing a musical instrument, such as the piano or guitar, would require the coordination of both hemispheres of the brain. This is because the left hemisphere is responsible for logical tasks like reading music and the right hemisphere controls the creative aspects like rhythm and expression.

How does the brain and nervous system work together?

The nervous system is connected through cells called neurons, which can be up to a metre long. these are connected to the spinal cords and also to the brain which is the head of the nervous system, the neurons break down into smaller receptors which are in our skin etc.

Whih disease is produced by ameoba?

Amebic dysentery is a disease caused by the parasite Entamoeba histolytica. Symptoms include severe diarrhea, abdominal cramps, and fever. It is typically contracted through contaminated food or water.

Do graded potentials increase amplitude as they move away from the stimulus?

No, graded potentials do not increase in amplitude as they move away from the stimulus. The amplitude of graded potentials will decrease with distance from the stimulus site due to the loss of charge.

Neurons are supported by what?

Neurons are supported by various types of glial cells, which provide structural support, insulation, and nourishment. Glial cells also help regulate the chemical environment surrounding neurons and play a crucial role in the repair and maintenance of the nervous system.

The chemical that transmits the signal across the neuromuscular junction is called?

Acetylcholine is the chemical that transmits signals across the neuromuscular junction. It binds to receptors on the muscle cell membrane, leading to muscle contraction.

What triggers an action potential?

An action potential is triggered when a sufficiently strong neural signal reaches the trigger zone of a neuron, which is the axon hillock or the initial segment of the axon.

The trigger zone contains a dense concentration of voltage-gated sodium-ion pores, which open and allow sodium ions into the neuron when the membrane voltage there rises from about -70mV resting potential to a trigger threshold of about -55mV as a result of a summing of inputs to the neuron.

The resulting inrush of sodium ions through the ion pores is the beginning of the action potential.

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