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*What cells produce granzymes and perforin (to kill infected cells)?

*Which type of antigen is present on the outside of all Antigen Presenting Cells?

*The space behind the external nose is called the:

*A ___________ is when the body temperature is above homeostatic levels?

*Which are external defenses of the immune system?

*How does specific immunity differ from nonspecific defenses?

        Which is a correct answer to the question? Only one option is correct.  You may want to use a scratch paper to work out your answer before entering it here.  TYPE THE NUMBER ONLY that corresponds to the correct answer.  If you type anything other than THE NUMBER this computer system will count your answer as incorrect.        ¿Deseas visitar la clínica ahora?   1 .  No,  no la desea visitar. 2 .   No, yo no deseo visitarla. 3 .   Si,  yo lo deseo visitar.

Type the answer that fits the given description.  Pick from the following word bank.     abuelo      primo         hermanastra        hermana       padres      madre       nietos        novio      almorzar      dormir    esposa  querer        saber          tomar             conocer        sobrino      Mi___________ es el hijo de mi hermano.

True or false?   Una orquesta toca música.

True or false?   Miramos películas en el cine.