"arterioles" - 1 õppematerjal

Füsioloogia kordamisküsimused 2014

Resistance in the blood vessels is effected by three parameters: 1. Length of the vessel. The longer the vessel the greater the resistance. 2. Viscosity of the blood. The greater the viscosity the greater the resistance. 3. Radius of the vessel. The smaller the radius the greater the resistance. Verevoolu kontroll/ regulatsioon http://www.biosbcc.net/doohan/sample/htm/COandMAPhtm.htm 1) Arterioraalse raadiuse sümpaatiline kontroll a. Arterioles are enervated (ослаблен) by the sympathetic nervous system only. b. Sympathetic nerve fibers secrete norepinephrine. c. Binding of norepinephrine to receptors on the smooth muscles of arterioles causes contraction and thus leads to vasoconstriction. d. Arterioles servicing tissues at rest receive a baseline amount of sympathetic stimulation and thus are slightly