[The suppression of neurogenic vascular reactions by a factor released into the blood during immobilization stress].
In isolated segment of the rat tail artery perfused with the animal donor's blood the effect of suppression of neurogenic vascular tonus, in immobilization of the animal donor, was found in 80% of cases. In 62% of cases, the suppression occurred at the beginning of the immobilization and seemed to be due to the effect of hypothetical humoral factor on the synapse area. In 38% of cases, the suppression started within 30-40 min of the immobilization start and had a different cause. The adaptive significance of these responses is discussed.
Medvedeva
N A
NA
Mashina
S Iu
SIu
Medvedev
O S
OS
D000818:Animals; D001794:Blood Pressure / Q000187:drug effects / Q000502:physiology; D003864:Depression, Chemical; D066298:In Vitro Techniques; D008297:Male; D009131:Muscle, Smooth, Vascular / Q000187:drug effects / Q000502:physiology; D018377:Neurotransmitter Agents / Q000097:blood*; D010477:Perfusion / Q000295:instrumentation / Q000379:methods; D051381:Rats; D012149:Restraint, Physical; D013315:Stress, Psychological / Q000097:blood* / Q000503:physiopathology; D013997:Time Factors; D014655:Vascular Resistance / Q000187:drug effects* / Q000502:physiology
D018377:Neurotransmitter Agents