IFNs stimulate B cells to produce antibodies.

Which of the following types of cells is involved in adaptive immunity?

A patient who lacks intrinsic factor would likely develop __________.

Which of the following is considered a type of lymphocyte?

Arteries carry blood away from the heart; veins carry blood to the heart.

The second heart sound (the “dup” of “lub-dup”) is caused by the __________.

Steroid hormones are synthesized from __________.

__________ are substances that can trigger the adaptive defenses and provoke an immune response.

Dim light and peripheral vision receptors are called __________.

Which of the following conditions, if left untreated, progresses to respiratory paralysis and death?