Europa,one of the Galilean Satellites of Jupiter,has a Surface Consisting

question 65

Multiple Choice

Europa,one of the Galilean satellites of Jupiter,has a surface consisting of

• A) rock,heavily cratered like the highlands of our Moon.
• B) an ancient,icy crust covered with numerous craters;no surface cracks or groove belts that would indicate internal activity.
• C) a relatively young,icy crust covered with a network of streaks and cracks,and only a few impact craters.
• D) an icy crust showing two interlocking types of terrain,one ancient and heavily cratered,the other younger with systems of parallel grooves.

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Definitions:

Axon

A long, slender projection of a neuron that typically conducts electrical impulses away from the neuron's cell body.

Neuromuscular Junction

Synapse between a neuron and a muscle cell.

Impulse

A sudden, involuntary urge to perform an action or a quick transmission of electrical signals along a nerve pathway.