Question

1. which of the following best explains why the brain tells the respiratory system to breathe harder in humid weather?

decreased moisture levels
added histamine response
displaced oxygen molecules
increased body temperature

Explanation:

In humid weather, water vapor molecules displace oxygen molecules in the air, reducing the partial pressure of oxygen available for inhalation. The brain detects lower oxygen levels and signals the respiratory system to breathe harder to compensate for the reduced oxygen intake.

Answer:

displaced oxygen molecules