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Biology II Part II
Biology 102
13
Biology
Undergraduate 1
03/28/2012

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Term
skeletal muscle tissue
Definition
attaches to bones for voluntary movement it; contains striated multinucleated, long cells
Term
smooth muscle tissue
Definition
contains spindle-shaped cells; it lines the gut , blood vessels, and glands; its operation is involuntary
Term
cardiac muscle tissue
Definition
composed of short, striated cells that can function n units
Term
intercalated disks
Definition
short dark thin lines
Term
Nervous tissue
Definition
exerts the greatest control over the body’s responsiveness to changing conditions
Term
Eleven organ systems in vertebrates contribute
Definition
to the survival of the living cells of the body
Term
The cell body contains
Definition
the nucleus and metabolic machinery for protein synthesis
Term
Dendrites
Definition
are numerous, usually short extensions that receive stimuli
Term
An axon
Definition
is usually a single, rather long extension that transmits impulses to other cells at its branched ending; signals actually arise in the trigger zones
Term
A neuron at rest maintains
Definition
a steady voltage difference across its plasma membrane
Term
The inside (cytoplasmic fluid)
Definition
is more negatively charged than the outsde (extracellular fluid)
Term
resting membrane potential
Definition
(impulse)
Term
When a neuron receives signals, an abrupt, temporary reversal
Definition
the inside becomes more positive--in the polarity is generated
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