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PB Biology Unit 13: Nervous System

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Central Nervous System
The brain and spinal cord
Peripheral Nervous System
the sensory and motor neurons that connect the central nervous system to the rest of the body
Sensory Somatic
conscience control over all skeletal muscles
Autonomic
This nervous system provides involuntary control over smooth muscle, cardiac muscle, and glands.
Sympathetic
Branch of the nervous system that prepares the body for an emergency
Parasympathetic
Branch of nervous system that prepares for homeostasis
Sense Receptors
detect stimulus
Neuron
transmits stimulus
Effector
in response to stimulus the muscles and glands produce hormones
Neuron
Basic unit of the Nervous System
Axons
a part of a neuron that carries impulses away from the cell body
Dendrites
branching extensions of neuron that receives messages from neighboring neurons
Mylen Sheath
insulates neuron and makes the messages transmit quicker
Sensory Neuron
transmits messages from receptor to CNS
Interneuron
transmits messages within the CNS
Motor Neuron
transmits messages fro CNS to the effector
Reflex
a nervous response without conscious control by the brain
Synapse
Spaces between neurons where impulses cross
Neurotransmitters
chemicals that allow the transmissions to cross the synapse
Cerebrum
part of the brain that controls personality, thinking, ability to taste and talk, sight etc
Cerebellum
part of the brains that controls muscle coordination, balance, and muscle tone
Medulla
part of the brain that is responsible for involuntary actions like muscle movement, heart beat, gland secretion and digestion
Ventricles
hollow interconnecting chambers filled with Cerebrospinal Fluid
Cerebrospinal Fluid
fluid that protects brain from trauma
Meninges
a membrane 3 layers thick that protects the brain and spinal cord