Neural and metabolic control of arteriolar diameter.
During sympathetic nerve activity, sympathetic transmitter causes depolarizations which trigger voltage dependent Ca++ entry. The ability of arteriolar membranes to sum together successive e.j.ps is changed as a consequence of cellular activity, i.e. increased [K+]o. Furthermore, the ability of arteriolar membrane to permit voltage dependent Ca++ entry is modified by a second consequence of cellular activity, i.e. changes in external pH.
Hirst
G D
GD
Department of Zoology, University of Melbourne, Parkville, Victoria, Australia.
Edwards
F R
FR
Silverberg
G D
GD
D000818:Animals; D001160:Arterioles / Q000033:anatomy & histology / Q000294:innervation* / Q000378:metabolism; D006801:Humans; D009474:Neurons / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology