Nervous System

Maybe worse, since young people's nervous system are functioning well ... old ones can get tired in processing ideas because they are old... SPP.

organs and by short postganglionic fibers

A damage or cutting of any sort of nerve in, for example, your arm may reduce your ability to touch or operate that arm to its full ability due to the lack of an efficient movement of current to command the arm and the inability to output to the spine and brain the feelings of the skin and the arm.

Opium gum can be accessed from poppies. Alcohol is produced in nature by the fermentation of sugars by yeast, and there are some CNS depressants like belladonna that are available in plants. There are other examples.

In addition to ingested chemicals, most animal venoms work by depressing the CNS. They would not, however, be considered drugs unless processed and used for antivenin.

What_is_the_path_that_sound_takes_through_the_earwaves enter through the outer ear, then sound waves move through the ear canal. Next sound waves strike the eardrum, causing it to vibrate, then vibrations enter the middle ear. Then the hammer picks up the vibrations, then vibrations are passed to the anvil. Next the vibrations are transmitted to the stirrup, then a vibrating membrane transmits vibrations to the inner ear, and then vibrations are channeled into the cochlea. Then nerve cells detect vibrations and convert them to electrical impulses, then electrical impulses are transmitted to the brain. Then the brain interprets electrical impulses as sound.

the axons of myelinated neurons are embeded in a protective covering of gray matter.

it stimulates the gastrointestinal activity

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31 pairs of spinal nerves, separated by vertebrae (exit in intervertebral foramina) of the different sections of the spine: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.

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Yes.  It is a neurotransmitter used in the brain, the peripheral autonomic nerves, and the junction between nerves and muscles.

The central nervous system is the brain and spinal cord. It s located in the cranial cavity (brain) and the spine (spinal cord).

yes

Spinal tracts are communication pathways. There are numerous tracts and they carry messages from the body to the brain and from the brain to the body.

Reacting to your name when called,removing your hand when being burnt and jumping when you see a snake are examples of automatic responses that are controlled by the nervous system.

Effectors.

Stimuli

No ithink im only a gifted 12 year old

IX

olfactory receptor cells

vanessa B&F uniben

what structures does the vagus nerve su

A somatic reflex is where the body responds to stimulus. The message from the stimulus is sent through the central nervous system via the spine, and from there it travels to the brain.

Motor nerve cells are the nerves that are supplied from the the brain to the muscles and the glands to perform a function. They are used in contracting and relaxing the muscles to perform certain specified functions.

It is very important. Sleep is very important for memory. In fact, while sleeping, the subject see what he learned in the day in dreams. While he is sleeping, the heart and other organisms are slowing down their activities. Sleep is crucial for a child because the body is growing and developing while sleeping. People who don't sleep, tend to forget things, they are tired and their intellectual capacities are reduced.

But there is a rare sickness where a person can't sleep (this is not insomnia) and does not feel the need to sleep. His memory works normaly, he is not tired and his intellectual capacities are normal.

Because of this disease, scientifists wonder why healty people that don't sleep develop memory problem, are tired and their intellectual capacities are decreased while people who has this desease don't need sleep at all.

medulla