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.
Epinephrine. Epinephrine and norepinephrine, more commonly called adrenaline and noradrenaline, are produced by the adrenal medulla. These are hormones that increase heart rate, glucose levels and oxygen in the body, while suppressing non-essential bodily functions.ndocrine glands, such as the adrenal glands, directly influence the body by secreting into the blood, rather than through an intermediary, such as a glandular duct.The adrenal glands are composed of two major components: the adrenal medulla and the adrenal cortex.