The neurotransmitter acetylcholine induces vasodilation in intact blood vessels due to release of
A. nitric oxide from the endothelium.
B. nitric oxide from the smooth muscle layer.
C. nitric oxide from the lymphatic system.
D. carbon monoxide from the endothelium.
E. norepinephrine from the endothelium.
A. nitric oxide from the endothelium.
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What will be an ideal response?
Derived character states shared by clade members are called
A. symplesiomorphies. B. ancestral traits. C. homoplasies. D. plesiomorphies. E. synapomorphies.
An increase in the white cell count is called
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The mechanism of pathogenesis by prions may involve a conformational change in the prion protein (PrP) to an abnormal form.
Answer the following statement true (T) or false (F)