Today the World's 7 Billion People Are Distributed Across How

question 50

Multiple Choice

Today the world's 7 billion people are distributed across how many countries?

• A)200
• B)130
• C)150
• D)195

---

Definitions:

Peripheral Nervous System

The part of the nervous system that consists of nerves and ganglia outside of the brain and spinal cord, connecting the central nervous system to limbs and organs.

Reticular Formation

A network of nerve pathways located in the brainstem that mediates the overall level of consciousness.

Alertness

The state of being watchful and ready to respond quickly to any changes or threats.

Emotions

Complex psychological states that involve a subjective experience, a physiological response, and a behavioral or expressive response.