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Definition
| a complex information processing system that coordinate all the activities of the body |
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Term
| The nervous system is composed of...... |
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Definition
| the brain, the spinal cord (CNS) and the nerves (PNS) |
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| The brain is composed of 2 basic types of nervous tissue___________ & _______________ cells |
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Definition
neurons: individual nerve cells capable of conduction an electrical impulse in response to stimuli
neuroglial cells or nerve glue: neuron support cells, myelin |
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Definition
| a fatty substance produced by neuroglial cells that coat axons, insulating them and making they conduct electrical impulses faster |
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Definition
individual nerve cells capable of conducting an electrical impulse.
dendrites, axons, cell body (soma) |
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| the point at which the axon of one neuron meets the dendrite of the next neuron |
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Definition
| =nerve glue, support neurons, some produce myelin (white matter) |
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Definition
the Central Nervous system
brain and spinal cord
contains white and grey mater |
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Definition
: many branched, part of a neuron
=receives impulses |
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Definition
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Definition
-one per neuron
-transmit electrical impulses
-sometimes covered in myelin |
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Definition
| 3 membranes that encase the CNS (brain & spinal cord) |
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Definition
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Definition
| thin, delicate spidery middle membrane |
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Definition
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Definition
the part of the CNS that included all the higher nerve centers;
enclosed within the cranium
3-pounds |
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Definition
largest part of brain; 2-lbs
processes memory, judgement, emotions, thoughts
outer layer is the Cerebral Cortex |
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Term
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Definition
outer portion of the cerebrum;
-consists of grey mater
gyri & sulci
2-hemispheres connected by corpus callosum |
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Definition
most anterior love of the cerebrum;
responsible for speech |
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Definition
most superior lobe of the cerebrum;
interprets language & sensory information |
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Definition
most posterior part of the cerebrum
processes vision |
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Definition
located laterally, left and right in the brain
responsible for smell and hearing |
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Term
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Definition
4 interconnected cavities within the brain, connected via foramen and an aquaduct
=continuous with the spinal cord
=contain CSF, clear watery liquid; protects nervous tissue from shock and motion |
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Definition
voluntary motion
balance & equilibrium
2nd largest part of the brain
beneath posterior cerebrum |
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Definition
beneath the cerebrum
grey matter
relays impulses of the eyes, ears, and skin
thalamus
hypothalamus: controls ANS, CV SX, GI SX, endocrine Sx |
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Term
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Definition
| the part of the brain continuous with the spinal cord and comprised of the pons, midbrain and medulla oblongata |
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Definition
| the bridge conecting the cerebellum to the brain |
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Definition
| acts as a pathway between the brain and the spinal cord |
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Definition
| hindmost part of the brain stem continuous with the spinal cord |
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Definition
| provides a pathway for impulses traveling to and from the brain |
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Term
| Peripheral Nervous Sx (PNS): |
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Definition
consists of the nerves-31 spinal nerves splitting off of the spinal cord
12 cranial (I=olfactory nerve; II= Optic Nerve: VII= facial nerve; X= vagus nerve, heart |
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Term
| Two kinds of nerves in the PNS |
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Definition
Afferent-sensory receptor neurons
Efferent = effector or motor neurons |
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Definition
aka sensory receptor neurons of the PNS
carry impulses towards the CNS from receptors or sensory organs |
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Definition
aka Motor neurons, effector neurons
Carry impulses from the brain and spinal cord to the effectors such as muscles, organs, glands |
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Definition
| a mixed masses of afferent & efferent neurons; they both send and receive |
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Term
| Autonomic Nervous System (ANS) |
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Definition
sympathetic "flight or fight" during crisis or stress
parasympathetic "rest & digest" counter balances effects of sympathetic |
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