What is not a function of mucus in the nasal cavity?

a. to warm air entering the respiratory system

b. to break down oxygen entering the respiratory system

c. to moisten air entering the respiratory system

d. to trap particles entering the respiratory system

What should you not do when doing abdominal workouts? a. keep your chin off your chest b. keep your head aligned with the spine c. put pressure on your neck d. all of the above

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

Isabel wants to sign up with the online social network teenbook, which she heard about from her friends at school. the teenbook site asked isabel for some personal information to complete her registration. in addition to her full name, teenbook asked for the name of her school, the city where she lives, her age, and her favorite foods. what is the only information that isabel should give to best ensure her safety?