Question

RESPIRATION aka GAS EXCHANGE A. Define the terms “external respiration” and “internal respiration”.
B. Which transport mechanism is responsible for the movement of oxygen and carbon dioxide during these processes?
C. In this passive transport mechanism, gases always move from an area of _______ concentration to an area of ______ concentration until equal concentrations are reached.

Answer 1

A. External respiration: Exchange of gases between the external environment and the animal body.

Internal respiration: Exchange of gases between the alveoli of the lungs and the blood.

B. The actual exchange of gases occurs due to simple diffusion. Energy is not required to move oxygen or carbon dioxide across membranes.

C.In this passive transport mechanism, gases always move from an area of higher concentration to an area of lower concentration until equal concentrations are reached.