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Ch. 7 1-20
nervous system
20
Anatomy
12th Grade
03/03/2014

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Cards

Term
Action Potential (Nerve Impulse)
Definition
electrical event occurring when a stimulus of sufficient intensity is applied to a neuron or muscle cell, allowing sodium ions to move into the cell and reverse the polarity.
Term
Arachnoid Mater
Definition
the middle meningeal layer, it is web like.
Term
Arteriosclerosis
Definition
Any of a number of proliferative and degenerative changes in the arteries leading to their decreased elasticity.
Term
Astrocytes
Definition
a star-shaped glial cell of the central nervous system.
Term
Autonomic Nervous System (ANS)
Definition
the division of the nervous system that functions involuntarily; innervates cardiac muscle, smooth muscle, and glands.
Term
Axons
Definition
Neuron process that carries impulses away from the nerve cell body; efferent process; the conducting portion of a nerve cell.
Term
Blood Brain Barrier
Definition
mechanism that inhibits passage of materials from the blood into brain tissues.
Term
Brain Stem
Definition
the portion of the brain consisting of the medulla, pons, and mid brain.
Term
Central Nervous System (CNS)
Definition
the brain and the spinal chord.
Term
Cerebellum
Definition
part of the hind brain; involved in producing smoothly coordinated skeletal muscle activity.
Term
Cerebral Hemispheres
Definition
Either of the two symmetrical halves of the cerebrum, as divided by the longitudinal cerebral fissure
Term
Cerebrospinal Fluid (CSF)
Definition
Fluid produced by choroid plexi; fills the ventricles and surrounds the central nervous system.
Term
Cerebrum
Definition
largest part of the brain; consists of right and left cerebral hemispheres.
Term
Dura Mater
Definition
the outermost and toughest of the three membranes(meninges) covering the brain and spinal chord.
Term
Efferent Division
Definition
carries impulses from the CNS to effector organs, the muscles and glands. They activate muscles and gland, effect a response.
Term
Ependymal Cells
Definition
glial cells line the central cavities of the brain and the spinal chord. Their cilia helps to circulate the cerebrospinal fluid that fills those cavities and forms a protective cushion around the CNS.
Term
Frontal Lobe
Definition
One of the main structural divisions of the brain, which is located, as it is implied by its name, in the front part of the brain. The frontal lobe performs several important brain functions including planning and carrying out movements, judgment, insight, language, personality, and emotional control, among others.
Term
Ganglia
Definition
Group of nerve cells bodies located in the peripheral nervous system.
Term
Hypothalamus
Definition
region of the diencephalon forming the floor of the third ventricle of the brain.
Term
Meninges
Definition
membranes that cover the brain and spinal chord.
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