Substances that provoke allergies are known as
A. parasites.
B. antigens.
C. bacteria.
D. allergens.
D. allergens.
You might also like to view...
The ____________________ syndrome is a condition characterized by high levels of protein in the urine and low levels of protein present in the blood.?
Fill in the blank(s) with correct word
Which vehicle safety mechanism has proved more effective in saving lives?
a. seat belts b. air bags c. shoulder straps d. good tires e. anti-lock brakes
The process of taking small individual steps toward a behavior change goal is
A) action. B) journaling. C) preparation. D) shaping.
Lymphocytes are generated during an initial infection. Years later, these lymphocytes respond to repeated exposure to the infection. These lymphocytes are called ________ cells.
A. memory T and B B. helper T and B C. killer T and B D. suppressor T and B