definitions
What is the definition neuron?
Specialized nerve cell that is the basic building block of the nervous system designed to receive process and transmit information to other cells muscles or glands
What is the definition of central nervous system?
The command center made up of the brain and the spinal cord that processes incoming information and sends out instructions
What is a neurotransmitter?
A chemical messenger, that travels across the synapse to carry signals from one neuron to the receiving cell
What is the definition of Myelin sheath
A fatty layer of insulation produced by glial cells that wraps around the axon to protect protected and significantly speed of the travel of electrical signals
What is a near death experience?
A profound lucid, personal event reported by 10% to 20% of people who survive a close brush with death or clinical death
What is the definition of dendrites?
Branch like extensions attached to the cell body that act as the input sites receiving chemical messages from other neurons
What is the definition of peripheral nervous system?
The network of nerves that branches out from the brain and spinal cord to your skin, muscles and organs
What is action potential?
Rapid electrical surge that travels down the neuron axon to transmit a message
nodes of Ranvier
Gaps in the myelin sheath along the Exxon that helps propagate and accelerate the electrical pulse as it jumps down the line
Mary Jane
Marijuana is a psychoactive drug. It contains chemical compounds that change how your brain works your mood and how you feel or think.
What is the definition of cell body (Soma?)
The central life support center of the neuron that houses the nucleus integrates incoming signals from the dendrites and passes the message along if the threshold is met
What is the definition of somatic nervous system?
Controls voluntary movements by sending signals from the brain to your skeletal muscles
What is threshold?
The minimal level or intensity required for a person to detect a stimulus or a change in a stimulus
Definition of axon terminal
Small bulb like structures at the very end of an ax on that store and release chemical messages called neurotransmitters into the synapse
LSD
A powerful synthetic, psychedelic and hallucinogen commonly known as acid binding to serotonin receptors in the brain, changing how a person respond to mood emotions and sensory inputs
What is the definition of axon?
A long tube like fiber that carries the electrical impulse (action potential) away from the cell body towards the other neurons and muscles or glands
Automatic nervous system definition
Controls involuntary automatic functions that keep you alive without you thinking about it
Depolarization
A neurons internal charge becomes less negative as a positive ion rushes in which triggers in action potential
Glial cells definition
Cells in the nervous system, that nourish protected and insulate neurons
Caffeine
A natural stimulant drug that speeds up activity in your brain and nervous system
What is the definition of synapse?
The tiny fluid filled gap or junction between the axon terminals of sending neuron and the dendrite of receiving neuron
Definition of parasympathetic nervous system
Triggers rest, and digest response to calm the body down and conserve energy
Multiple sclerosis
Disease of the central nervous system where that immune system mistakenly attacks the protective myelin sheath surrounding nerve fibers
Reflex arc definition
Simple automatic neural pathway that produces a rapid response to a stimulus without routing through the brain first
Cocaine
A powerful and highly addictive central stimulate drug extracted from the leaves of the South American cocoa plant