Flashcards - Basics of the Nervous System

Flashcards - Basics of the Nervous System
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16 cards in set
brain stem
The brainstem is the posterior part of the brain, adjoining and structurally continuous with the spinal cord
The hindbrain or rhombencephalon is a developmental categorization of portions of the central nervous system in vertebrates
autonomic nervous system
The autonomic nervous system is a division of the peripheral nervous system that influences the function of internal organs
Norepinephrine , also called noradrenaline or noradrenalin, is an organic chemical in the catecholamine family that functions in the human brain and body as a hormone and neurotransmitter
reflex arc
A reflex arc is a neural pathway that controls a reflex action
action potential
In physiology, an action potential is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory
multiple sclerosis
Multiple sclerosis is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged
myelin sheath
Myelin is a fatty white substance that surrounds the axon of some nerve cells, forming an electrically insulating layer
The fovea centralis is a small, central pit composed of closely packed cones in the eye
optic nerve
The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain
bony labyrinth
The bony labyrinth is the rigid, bony outer wall of the inner ear in the temporal bone
external ear
The outer ear is the external portion of the ear, which consists of the auricle and the ear canal
internal ear
The inner ear is the innermost part of the vertebrate ear
middle ear
The middle ear is the portion of the ear internal to the eardrum, and external to the oval window of the inner ear
The ossicles are three bones in either middle ear that are among the smallest bones in the human body
tympanic membrane
In human anatomy, the eardrum, or tympanic membrane, is a thin, cone-shaped membrane that separates the external ear from the middle ear in humans and other tetrapods

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