Which of These Was Not Descriptive of the African Continent

question 42

Multiple Choice

Which of these was not descriptive of the African continent?

• A) The mortality rate for visiting Europeans was probably higher than that for slaves being taken to the Americas.
• B) Coastal African traders often exaggerated tales of many savages lying in wait for any intruders who might venture away from the coast.
• C) Europeans could not take their animals into the interior, because the diseases that killed men also killed horses and mules.
• D) Most rivers running toward the coast have now been determined to be fairly easy to navigate, despite the warnings of the original traders.
• E) All of the options are descriptive of Africa.

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Definitions:

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A potent central nervous system stimulant used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy, and recreationally as a performance enhancer and euphoriant.

Blood-Brain Barrier

A selective permeability barrier that protects the brain from foreign substances in the blood that may injure the brain.

Endothelial Membrane

A thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.

Blood-Brain Barrier

A selective barrier that prevents certain substances in the bloodstream from entering the brain tissue, protecting the brain from infections and toxins.