Chapter 29 By jack williams

the Central Nervous system or CNS for short is the extremely complex system of nerve tissues that work together to control the bodies activities. In all vertebrates it comprises the brain and spinal cord.
The peripheral nervous system is the complex system of nerves that resides outside the brain and the spinal chord.
The somatic nervous system is the part of the peripheral nervous system associated with skeletal muscle voluntary control of body movements. The somatic nervous system consists of motor nerves or sensory nerves, helps us feel.
The Autonomal System is the part of the body that is responsible for conducting non-conscious movements of humans such as breathing, heartbeat, and digestive functions. Responsible for controlling not voluntary movements.
Sensory neurons are the nerve cells that make up the nervous system which are are necessary to convert external stimuli from the organism's surrounding environment into internal electrical impulses for the brain. Allow us to feel pain and react quickly based on the source of the pain.
An interneuron is a neuron that is responsible for sending messages and impulses between other neurons, importantly as part of a reflex arc.
A motor neuron is a nerve whose cell body is located within the spinal cord and whose fiber projects reside outside of the spinal chord to directly or indirectly control organs, most commonly muscles or glands.
Acetylcholine is the national urally produced chemical that functions in the brain and body of many different animals and humans, used as a neurotransmitter ~ which is a chemical released by nerve cells to send signals and messages to other cells in the body
Epinephrine and norepinephrine are released by the adrenal medulla and nervous system when the body feels threatened. They are the flight or fight hormones that are released when the body is under extreme fright or stress. During stress, much of the body's energy is used to combat imminent danger. Ex. When someone lifts a heavy car off of their dying family member.
Synapse- Combination between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
White matter- composed of bundles of myelinated nerve cell projections, which connect various gray matter areas of the brain to each other, and carry nerve impulses between neurons
Gray matter- a major component of the central nervous system, consisting of neuronal cell bodies
Cerebral cortex- the outer layer of the cerebrum, composed of folded gray matter and playing an important role in consciousness
The limpid system - emotion center of the brain, while the hippocampus plays an essential role in the formation of new memories about past experiences

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