The head of a Roman snail, four tentacles well visible. [RN] Observing a snail crawling around, the view is immediately attracted by its head, orienting itself in its surroundings using the tentacles. The snail feels its environment, touches an obstacle and withdraws the tentacle.
One of these hormones is epinephrine, which can be defined as a hormone secreted by the adrenal medulla in response to short-term stress. Epinephrine is also called adrenaline, and you may have heard of this term before.
norepinephrine (NE). [norâ²nÃ´râ²epinef]. rin an adrenergic (hormone) catecholamine that acts to increase blood pressure by vasoconstriction but does not affect cardiac. Output it is synthesized by the adrenal, medulla the peripheral sympathetic, nerves and the central nervous. system