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the central nervous system is includes the brain and spinal cord.

spinal cord

part of the central nervous system that contains interneurons and connects the brain with the rest of the body.

central nervous system

the main nervous system consisting of the brain and the spinal cord

peripheral nervous system

the secondary nervous system containing nerve extensions running out from the spinal cord to all parts of the body.

voluntary movements

Movements that you control. You know about them before they happen

right hemisphere

right cerebrum, controls left side of body mainly.

left hemisphere

Left cerebrum, controlls right side of body.

brain stem

most primitive part of the brain which controls involuntary reflexes such as breathing, digestion, heart rate, etc.


Back of brain below occipital lobe. Balance, Coordination, Movement.

cerebrum/cerebral cortex

Left and right hemispheres. The thinking part of the brain which controls all thought.

frontal lobes

Front of brain. Planning for the future, scheduling, short term memory.

neuron/nerve cell

a type of cell which passes electrical impulses to the brain and spinal cord. Relays heat, pain, texture.


extend from the cell body of a neuron, and recieve messages from other cells


the space between two neurons through which neurotransmiters travel

rods and cones

receptors in the eye which allow organisms to see in color and shades

myelin sheath

a layer of fatty tissue encasing a neuron's axon that speeds transmission


carry impulses to the nerve cell body.


long fiber that carries impulses away from the cell body of a neuron

peripheral nervous system

consists of nerves and sensory receptors

Name 4 brain disorders and explain what each does?

1.MS--multiple sclerosis--the myelin sheath that protects the nerves hardens, limiting the travel of electrical impulses.
2. ALS--amyotrophic lateral sclerosis--known as Lou Gehrig's disease--the motor neurons are gradually destroyed and the muscles that depend on those nerves become useless. The brain shrinks.
3. Epilepsy--neurons release their electrical charges suddenly causing a seizure.
4. Meningitis the layers of the connective tissue that surrounds the brain and spinal cord swell. It can cause paralysis and death.

What are the 3 different groups of neurons?

Sensory neurons-sends information from the sense organs to the brain.
Motor neurons--carry electrical impulses from the brain or spinal cord to the muscles or glands.
Association neurons--which function in reflexes, which transfer electrical impulses from a sensory neuron directly to a motor neuron.22

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