Nervous System

Cerebrospinal fluid (CSF) is primarily secreted by the choroid plexus, a network of cells located in the ventricles of the brain. It is produced through a combination of filtration and active transport processes, allowing nutrients and electrolytes to be transferred into the fluid. CSF serves several essential functions, including cushioning the brain and spinal cord, removing waste, and maintaining stable intracranial pressure.

Cerebral cortex

it consists of four main parts:

the brain

the spinal cord

the peripheral nervous system

the autonomic nervous system

neural plasticity - neurons can alter their:

- dendrite-to-dendrite connections

- axon-to-dendrite connections

- axon-to-axon connections

- neurotransmitter receptor density

This allows for the brain to change the way that different neural networks interconnect, and it also allows regulation and modulation of neural signals so that the "weights" between neurons are changed to remodulate those signals.

Diseases, such as Alzheimer's disease, ALS, and multiple sclerosis, can also result in demyelination, which results in signal loss along axons.

What is the entire name of the motor nervous system

I- Olefactory (sensory): smell.

II- Optic (sensory): vision.

The main ions involved with the nervous system are potassium, sodium, chloride, and calcium. Each have different effects such as changing the voltage of the membrane and changing the confirmation of membrane bound proteins.

A somatic system

Sensory receptors provide the connection between the stimulus such as heat, cold, and pain and the CNS.

The brain continues to control the nervous system even in times of limited body resources. The only way this action ceases is if someone was in a coma or passed away.

Intelligent support systems (ISS), sometimes referred to as expert systems, are one of the more advanced forms of information systems.

cannon-bard theory

Yes it is!

obviously

The axoplasm is the cytoplasm of an axon.

simple-> doesnt coordinate activities unless there is a ganglia

complex -> has a true brain with sensory structure that coordinates acitivties efficiently

Nerve impulses travel up to 250 miles per hour. 119m/s (muscles)

76.2m/s (touch)

0.61m/s (pain) 100 m/s (passive)

20 - 30 m/s (thinking) "Depending on the type of fiber, the neural impulse travels at speed ranging from a sluggish 2 miles per hour to, in some myelinated fibers, a breackneck 200 or more miles per hour. But even this top speed is 3 million times slower than the speed of electricity through a wire."

sdsd

I have never heard of the term 'transmission zone' (which may be someone's personal name for what I'm about to explain) but neurons send their chemical signals across what is known as a synapse, the region where the axon of one neuron meets up with another neuron (most often a dendrite). The space between these two neurons (the non-neuron space in the synapse) is called the synaptic cleft. Through this space, neurotransmitters pass through and act on the receiving neuron once they reach it.

centrioles

Motor Neurons and the chemical and electrical interactions between them carry information from the central nervous system to tissues.

Nerve

The thalamus

:d

1 sensory organ - sensory nerves - spinal cord - brain

2 brain - motor nerves - spinal cord - muscles

smooth muscle