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单词 alpha receptor
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alpha receptor
alpha receptor n. one of the two main types of adrenergic receptor, activation of which causes contraction of smooth muscle in blood vessels and certain other organs, resulting esp. in vasoconstriction and increased blood pressure.
ΚΠ
1948 R. P. Ahlquist in Amer. Jrnl. Physiol. 153 596 It [sc. epinephrine] is the most active substance on the alpha receptors and almost the most active on the beta receptors.
1974 V. B. Mountcastle et al. Med. Physiol. (ed. 13) II. xxxviii. 954/1 Reaction to agents such as epinephrine, which activates both alpha and beta receptors, depends on the relative numbers of each type in the smooth muscle population.
2007 M. N. Levy & A. J. Pappano Cardiovascular Physiol. (ed. 9) xi. 207/1 The α- and β-adrenergic drugs and their respective blocking agents reveal the presence of alpha receptors (constrictors) and beta receptors (dilators) on the coronary vessels.
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