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. 2011 Oct 19;67A(2):109–117. doi: 10.1093/gerona/glr190

Figure 4.

Figure 4.

Abnormal endothelial function in aged arteries. (A) Vasoconstriction of uninjured young and aged arteries in response to phenylephrine (PE). Error bars denote SEM; n = 3. The difference between young and aged arteries is not significant (p = .47, paired t test). (B) Vasorelaxation of uninjured young and aged arteries in response to acetylcholine (Ach). Error bars denote SEM; n = 3. The difference between young and aged arteries is significant (p = .01, paired t test). (C) Representative photomicrographs of uninjured young and aged carotid arteries examined en face with immunofluorescence; n = 3.