166.A 27-year-old man returns from a climbing trip to Ouray, Colorado.
He spent 2 weeks camping with his fellow climbing friends. He is dehy-
drated and complains that he has been vomiting and has had “foul-
smelling” diarrhea since his return from camping. He says that he has
noticed several large worms in the vomitus and had a visible worm in his
loose stool last week. A stool sample is positive for ova and parasites. How
do the structures labeled in the accompanying electron micrograph assist
in defending against this condition?
260 Anatomy, Histology, and Cell Biology
(Electron micrograph courtesy of Dr. Amy Klion)a. Phagocytose parasites
b. Release IL-1 which activates antigen presenting cells (APCs) and CD4+
lymphocytes
c. Release IL-2 which stimulates the proliferation and activation of B-cells and T-cells.
d. Produce IL-5 which stimulates the production and maturation of eosinophils
during inflammation
e. Contain a toxin for parasites