Brian Is a Heavy Cocaine User

question 202

Multiple Choice

Brian is a heavy cocaine user.What is occurring in his brain because of his use of cocaine?

• A) There is an increase in the amount of dopamine produced in the brain.
• B) Cocaine stimulates the growth of dendrites.
• C) There is a reduction in the number of dopamine receptors in the areas of his brain involved in reward and pleasure.
• D) There is a reduction in the number of acetylcholine receptors in the areas of his brain involved in memory.

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Definitions:

Overhead Camshaft Engines

Engines where the camshaft is located above the cylinder heads, directly operating the valves, which allows for more precise valve timing.

Camshaft

A crankshaft-driven shaft containing oblong-shaped lobes that push on valve lifters to open cylinder head valves.

Cylinder Head

The component of an engine that closes in the top of the cylinder, forming the combustion chamber and containing mechanisms such as valves and spark plugs.

Four-Stroke Cycle

A cycle of internal combustion engine operation that includes intake, compression, power, and exhaust strokes.