White blood cells use to identify foreign substances in the body.
a. platelets and white blood cells
b. antibodies and antigens
c. enzymes and red blood cells
d. white blood cells and red blood cells

Joe has been suffering from asthma since childhood. recently, a severe asthma attack struck, after which he has been finding it difficult to breathe normally. what can ease his condition?

True or false drinking alcohol at a faster rate will not affect a body’s absorption of alcohol

Choose the correct drug to complete the sentence. is a powerful stimulant. is a highly addictive opiate. is prescribed for medical purposes in many states. which locations are covered in the drug-free school policy? check all that apply. school bus home school lunchroom sporting event at another school shopping center