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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
Which ailment of the nervous system is characterized by regular convulsions?
hypertension and atheroclosis
The nervous system allows us to interact with the environment?
The peripheral nervous system composed of sensory and motor neurons allows us to interact with our environment
Which parts of the gastrointestinal tract are innervated by the somatic nervous system?
GI tract is innervated locally by the enteric nervous system and activity of the Cajal pacemaker cells and by the autonomic nervous system (sympathetic / parasympathetic). It is not innervated by the somatic nervous system.
I'm a neurobiologist/physiologist.
Are lysosomes unique to neurons?
No, lysosomes are not unique to neurons. They are found in many types of animal cells.
What body system has final control over breathing?
The nervous system has final control over the process of breathing, which is performed by the respiratory system.
What is a Central Nervous System?
The nervous system helps all the parts of the body to communicate with each other. The brain and spinal cord make up the central nervous system. The other nerves of the body are called the peripheral nervous system. Problems of the nervous system include epilepsy, meningitis, multiple sclerosis (MS) and Parkinson's disease.
When the baroreceptors detect the loss of pressure, they try to return pressure to a homeostatic level. In order to do this, they constrict the blood vessels, which raises the pressure by having the same amount of blood within a smaller "container". The capillaries near the skin will aid in this by restricting flow, causing the skin to be cold and clammy. The baroreceptor reflex also raises the heart rate, which also has the affect of raising blood pressure.
Why do you wake up before the best part in a dream?
The short answer would be that the best part of the dream IS waking up.
... The dream itself is building the sense of expectation that something really wonderful is about to happen, such as a long-awaited kiss, the discovery of a treasure, or launching into free-form flight. But the mental processes that create that sense of anticipation are simultaneously lifting the dreamer out of the deeper stages of sleep toward wakefulness. So in a very real sense, awakening is the culmination and climax of the dream.
... see attached link on sleep stages, below.
Diseases of the nervous system - stroke?
You get the blood supply of the brain affected by three mechanisms. One is bleeding, second in blockage of the blood vessel, due to thrombosis. Third is by way of blockage of blood vessel due to embolism. The patient usually get hemiplegia or weakness or paralysis of the half part of the body.
What is Dual innervation in terms of autonomic nervous system?
DUAL INNERVATION: One organ can receive impulses from both sympathetic and parasympathetic motor neurons (dual innervation); one division increases activity of organ, other division decreases activity of organ.
While some organs are innervated by just one division, most vital organs receive dual innervation which means they receive instructions from both the sympathetic and parasympathetic divisions.
Probably because some portion of those synapses are inhibitory as opposed to excitatory.
What could be wrong if the lower part of your scapula goes numb throughout the day?
Answer
You might have a pinched or damaged nerve. I'd see the doctor to make sure it isn't anything serious, because if it is a pinched or damaged nerve, and it isn't treated right away, you might have permanent damage.
Neuromuscular Junctions
Found in: Human Anatomy & Physiology 8th Edition by Elaine N. Marieb and Katja Hoehn
Why is the brain so important to the nervous system?
The brain is the command center for the body, controlling all bodily functions. The brain maintains life functions of the body like the heartbeat, temperature regulation, and digestion subconsciously. The brain controls the other areas like speech and motion through conscious thought.
That may seem possible from illustrations, but in actuality the role of homeostasis is to have both systems functioning equally to maintain balance in the body systems.
1. After parasympathetic fibers secret acytelcholine it is quickly broken down by acytelcholinesterase, which makes parasympathetic effects only a few seconds long.
The nervous system carries impulses to and from the brain by way of neurons. The bundles are called nerves. Sensory nerves bring impulses into the spinal cord and brain and motor neuron carry impulses away from the brain and spinal cord to the muscles and glands.
What are the demographics of vestibular schwannoma?
Most people who develop a vestibular schwannoma are between the ages of 30 and 50; children rarely develop vestibular schwannoma. Women are slightly more likely than men to develop a vestibular schwannoma.
