Question

Homeostasis is the ability of the body to maintain internal balance despite changing external conditions. How does the respiratory system help maintain homeostasis?
The respiratory system helps release hormones to control body processes.
The respiratory system helps release unwanted heat and water from the body.
The respiratory system produces white blood cells that kill disease-causing organisms.
The respiratory system releases enzymes that help in the break down of food.

Answer 1

The correct choice is: "The respiratory system helps release unwanted heat and water from the body."

Brief explanation: breathing releases water vapor and heat with each exhalation and—more importantly for homeostasis—removes CO2 and supplies O2, which helps keep blood gases and pH within narrow limits.