Which structure is directly involved in gas exchange?

trachea

pharynx

alveoli

bronchi

Which of the following is not an internal factor of decision making? a. ethics b. emotions c. peer pressure d. attitude

Trustworthy health-related websites should be frequently reviewed by medical professionals, even if the content doesn't change. select the best answer from the choices provided. t f

If an online school program (i.e k12, ecot) assigns me a computer, would it be ok to use social media on it? would i get in trouble? i am not really sure from reading their terms and such.