Figure 3.

A. Representative images of immunohistochemistry staining for α-1A adrenergic receptors in the carotid artery (a) and external jugular vein (v). Scale bar = 50 μm at 20X magnification. B. Staining intensity (mean ± SEM) of α-1A adrenergic receptors from the carotid a and external jugular v of 3 mice per group x 2 sections per mouse. Background intensity Quantified from one section without stain was subtracted from α-1A adrenergic receptor staining intensity Quantified from the second section with primary antibody. *p<0.05 vs. external jugular v.