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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
Habits are behaviors that we tend to repeat on a regular basis. Our behaviors are controlled by our frontal lobes of the cerebral cortex. There is a neurological law the is called the Law of Facilitation. What it basically says is that the more times a neuron pathway is used, the easier and faster it will conduct an impulse along that same path. That's how we learn to ride a bicycle, or swim, or any other physical activity. It also explains why we tend to have certain habits that are particular to us individually. because we all do different things and develop different habits.
11 mS
Neurons that analyze visual input and respond to specific things are called?
feature detectors-apexA synapse makes an input to the neutrons that analyze visual input and respond to the specific things.
What are the twelve pairs of nerves that make up the PNS called?
There are 32 pars of spinal nerves that leave the brain and spinal chord to form the preipheral nervous system.
What are the parts and functions of the nervous system?
the nervous system is a sensitive part of the body
What is the cranial nerve that is involved in tasting well seasoned food?
VII the cranial nerve or the Facial
Cannon-Bard theory
What is the structure of a neuron and what kinds of neurons are found in the body?
A neuron has a large cell body that contains the nucleus, threadlike extensions called dendrites, and an axon. The dendrites carry impulses toward the neuron's cell body. The axon carries impulses away from the cell body. Nerve impulses begin in a dendrite, move toward the cell body, and then move down the axon. A neuron can have many dendrites, but it has only one axon. An axon, however, can have more than one tip, so the impulse can go to more than one other cell.
Axons and dendrites are sometimes called nerve fibers. Nerve fibers are often arranged in parallel bundles covered with connective tissue, something like a package of uncooked spaghetti wrapped in cellophane. A bundle of nerve fibers is called a nerve.
The amygdala.
When nervous why does the mouth become dry?
It has a HUGE part of the sympathetic nervous system. Which is also known as the "flight or fight response." When you are in a nervous situation, your body takes energy from your digestive tract, to make you more stronger, and ready for anything. Your brain reacts as if you are ready to fight or run. You might be confused on why all of this has to do with Dry Mouth. I get Dry Mouth everyday, from being nervous at school. (more so with exams/test days) If you know that there is going to be something that will make you nervous that day, chew gum, or a sugar free candy will help. I hope this answers your question. Take care!
Explain why the autonomic nervous system mediates the increase in blood flow to skeletal muscles?
Blood flows through the circulatory system based on the pressure and resistance of those vessels. The nervous system helps to measure this, and adjusts how the vessels are compressed by the surrounding muscles based on how needed oxygen is to those muscles.
State how the neurotransmitter is deactivated?
The nuerotransmitter is deactivated by acetylcholinesterase enzymes located in the membrane. Components of the neurotransmitter are actively reabsorbed back into the synaptic knob,recycled and repackaged.
How do receptor neurons help people perceive smells?
Receptor neurons in the nostrils first detect an odor by coming into contact with and reacting to gas molecules of the substance. Then the receptor neurons send information about the odor along the olfactory nerve to the brain.
One example is touching something very hot that might burn you: the reflex can pull the hand away from the hot object much quicker than the brain could decide if it was dangerously hot and pull the hand away. This reduces exposure to the heat and possible severity of any burn that might happen.
Of course the brain could then decide to risk touching the hot object again to better determine if it is actually dangerously hot or if the reflex just overreacted.
What is 'motor march' in nerve injury?
progressive regeneration or reinnervation of the more proximal motor units during recovery ..seen in case of axonotomesis
What drugs stimulate the central nervous system?
The category of drugs that stimulate the central nervous system are known as stimulants (sometimes known as uppers.) Some notable drugs in this genre are:
- Amphetamine
- Caffeine
- Ephedrine
- MDMA (sometimes called Ecstasy or Molly)
- MDVP (sometimes called bath salts)
- Mephedrone
- Methamphetamine
- Nicotine
- Propylhexadrine
- Pseudoephedrine
What are two major divisions of the nervous system?
THE TWO DIVISION OF THE NERVOUS SYSTEM ARE THE CENTRAL NERVOUS SYSTEM OR CNS AND PERIPHERAL NERVOUS SYSTEM OR PNS .
Central nervous system consist of the brain and the spinal cord . It receives and sorts out information coming from the environment and from inside the body and determines the appropriate action. Peripheral nervous system is made up of nerves that extend throughout the body . It is through these nerve cells that communicate between the Central nervous system and body tissues take place
It is the inflammation of the blood vessels in your head.
