Question # 6 What is the purpose of the pleura that surrounds the lungs?
To exchange oxygen for carbon dioxide
To protect against friction during breathing
To create negative pressure in the thoracic cavity
To maintain the temperature within the lungs

The effect of alcohol varies from one person to another, mostly because it depends on the blood alcohol concentration, or bac. what does blood alcohol concentration not depend on? a. amount of food in the stomach b. gender and size of the drinker c. rate of consumption d. time of drinking