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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
Does mustard gas attack the nervous system?
yes, it attack the central nervous system and it also causes red bumps that will quickly turn to blisters.
What is the muscle involved in the rotation of the eye?
The muscle is called an 'extraocular muscle', of which there are 6 - they are relatively small,incredible strong and efficient. They are : medial rectus; superior rectus; superior oblique; lateral rectus; inferior rectus and inferior oblique.
Why you can not connect peripherals directly to the system bus?
We can not connect peripherals directly to the system bus for the following reasons:
- To maintain the cleanest conditions possible inside the box
- You would need to snake the connectors/cables all over the inside of the case and possibly block the motion of the cooling fan(s)
- Protect the mother board from being damaged by too much pressure being applied
What are two ways your nervous system is like a computer system?
- One way is the nervous system sends messages throughout the body
- And the second way is the brain stem works like a plug
What is progressive disc degeneration?
Progressive disc degeneration is something that I myself suffer with wich it is the later stages of disc degeneration desease in wich the disc in your back and/or neck start to deteriate it is useuall caused by over working your back .. lifting the wrong way for too long and a whole lot of things but it over stresses the disc and causes them to deteriate and there for the mame of the desease the working mans desease as I call it
What is a simle nervous system?
A nerve net or diffused nervous system is called simple nervous system as present in cnidarians .
Where are the best places on the body to give a nerve pinch?
i was wondering how to do a shoulder nerve pinch but in my experience the soft spot of skin behind the ear is best for nerve pinches however this is to be done with caution do not hold for more than 5 seconds unless in a very serious situation as it may result in unconciosness and under no circumstances hold for more than 8 seconds as it may result in permanent brain damamge or death
What type of messengers are hormones?
Hormones are chemical messengers produced by the endocrine glands and secreted into the bloodstream to regulate various physiological processes in the body. They travel to target tissues and organs where they bind to specific receptors to initiate a response.
What cranial nerve number are 90 percent of all parasympathetic fibers derived from?
The vagus nerve, which is cranial nerve X, provides approximately 90 percent of all parasympathetic fibers in the body. It innervates many organs including the heart, lungs, and digestive system to help regulate functions such as heart rate, breathing, and digestion.
Compare between sympathetic and parasympathetic in reflex arc?
In parasympathetic reflex arc the preganglionic nerve fibre is longer than post ganglionic fibre, that is the synapse occur near the organ or tissue. While in sympathetic reflex arc both the pre and post have moderate sizes. The postganglionic fibre of parasympathetic always secrete acetylcholine as nuerotransmitter while postganglionic fibre of sympatheic reflex arc mostly secrete norepinephrine or epinephrine as nuerotransmitter. Some nerve fibres may secrete acetylcholine. For example postganglionic sympatehtic nerve fibres of sweat glands, pilorectal muscles and few blood vessels
What part of brain controls pupil dilation?
Edinger-Westphal nucleus of the brainstem controls the pupil reflex. An ER doctor who looks at the response to a pen light is checking on brain stem activity.
Based on the main neurotransmitters the sympathetic nervous system can be classified as what-?
These are motor neurons located in the ganglia of the PNS
What happens when rhodopsin in the retina of the eye is exposed to a bright light?
When Rhodopsin in the retina of the eye is exposed to a bright light, the Rhodopsin breaks down into Retinal and Opsin, allowing us to see in many different ranges of light and darkness.rhodopsin molecules break down into molecules of a colorless protein called opsin and a yellowish organic molecule called retainal synthesized from vitamin A
messenger neurons
What are the 4 barriers that keep humans healthy against pathogens?
Four barriers that protect humans from pathogens include the mucus of the upper respiratory system, the acid mantle of the skin, the stomach acid in the digestive system, and the cervical mucus of the female reproductive system. There are also celular barriers via the immune system that prevent infection.
What are the parts of the genome control system?
1) Epignetic marks
2) Protein-coding genes
3) Small RNAs
