Helper T cells do not ________.
A. secrete inflammatory chemicals.
B. secrete cytokines that stimulate clonal selection of B cells.
C. secrete cytokines that stimulate clonal selection of cytotoxic T cells.
D. secrete fever-producing chemicals.
E. secrete cytokines that stimulate macrophage activity.
Answer: D
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The blood vessel that branches from the subclavian artery to supply the anterior wall of the chest is the
A) internal thoracic. B) azygos artery. C) mediastinal artery. D) thoracic aorta. E) vertebral artery.
Which of these muscles is NOT used as an injection site?
A) deltoid B) gluteus medius C) gluteus maximus D) vastus lateralis
The most common type of cartilage, named for its glassy appearance, is
A. reticular cartilage. B. areolar cartilage. C. hyaline cartilage. D. fibrocartilage. E. elastic cartilage.
Excitotoxicity is caused by ________.
A. GABA inhibition B. insufficient synaptic release of ACh C. excessive synaptic release of glutamate D. insufficient synaptic release of glutamate