Interferons
A) prevent viruses from leaving a cell.
B) prevent viruses from entering a cell.
C) bind to viruses and destroy them.
D) interfere with viral replication.
E) reduce macrophage chemotaxis to the infection.
D
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The arachnoid mater
a. is the innermost meningeal layer b. a delicate, richly vascularized meningeal layer that is "cobwebby" in appearance c. a tough, non-elastic membrane that covers the central nervous system d. involved with the formation of CSF e. is characterized by a, b, and d
Degeneration of the neurons in which of the following structures leads to the muscle tremors associated with Parkinson disease?
A. Cerebral crus B. Inferior colliculi C. Pons D. Tegmentum E. Substantia nigra
Tay-Sachs disease results from abnormalities in:
a. Keratin b. Lysosomes c. Microtubules d. Mitochondria e. Rough endoplasmic reticulum
Muscles that rotate the palmar or plantar surface downward are classified as:
A) supinator B) levator C) pronator D) adductor