What cytokine inhibits cytokine production from macrophages to down-regulate the immune response?
A) interleukin-5
B) interleukin-4
C) interleukin-10
D) interferon-
E) interferon-
Answer: C) interleukin-10
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On a phylogenetic tree, each node (branchpoint) represents a divergence event, and the length of the branches represents the number of molecular changes that have taken place between the nodes.
Answer the following statement true (T) or false (F)
Air in the pleural cavity is called
a. hemothorax. b. pneumothorax. c. hemopneumothorax. d. hydrothorax. e. pleurothorax.
Make organic compounds Organisms that make their own organic compounds from inorganic substances are called
a) animals. b) animorphs. c) heterotrophs. d) autotrophs.
Which of the following statements is TRUE with regard to oral herpes?
A) Lesions become more severe with each recurrence. B) Ninety percent of all cases are caused by human herpesvirus 2 (HHV-2). C) Lesions can be triggered by emotional stress or physiologic changes. D) Primary infections are usually characterized by severe lesions. E) There is an effective cure for oral herpes.