Question

Organize the items listed into the proper sequence of events for gas exchange.

1) O2 is transported to cells by circulatory system
2) O2 is drawn into the lungs during inhalation
3) cells use O2 and generate CO2.
4) CO2 is exhaled
5)The circulatory system transports CO2 to the lungs

A. 1,2,3,4,5
B. 5,4,3,2,1
C. 2,1,3,5,4
D. 3,5,4,1,2
E. 2,1,3,4,5

Answer 1

The proper sequence of events for gas exchange is: inhalation, transport of O2 to cells, usage of O2 by cells, transport of CO2 to the lungs, and exhalation of CO2.

Step-by-step explanation:

The proper sequence of events for gas exchange is as follows:

1. O2 is drawn into the lungs during inhalation (2)
2. The circulatory system transports O2 to cells (1)
3. Cells use O2 and generate CO2 (3)
4. CO2 is transported by the circulatory system to the lungs (5)
5. CO2 is exhaled from the lungs (4)

This sequence ensures that oxygen is taken in by the lungs, delivered to the cells, and carbon dioxide is removed from the cells and exhaled.