Endocrine system is a group of glands that release hormones that control a variety of physiological processes in the body, including growth, sexual function, metabolism, Etc.,
These glands are ductless which directly secrete their hormones into the blood.
This system also helps to maintain internal homeostasis using hormones.
Hormones-
Body's chemical messengers are called hormones.
They move to tissues or organs in the body via the bloodstream.
They act slowly over time and have an impact on a variety of activities, including growth, development, and metabolism.
Another name for these substances is signaling molecules.
These substances function at extremely low concentrations.
They have an effect on the targeted cells.
Immediately destroyed after serving their function.
It might be amines, peptides, steroids, etc.
STEROIDS
A steroid is a biologically active organic compound with four rings arranged in a specific molecular configuration.
These compounds have 4 steroidal rings which contain 17 carbons.
Nomenclature
Four rings are joined to form steroids (A, B, C, and D). These hydrocarbons are cyclopentane per hydro phenanthrenes chemically speaking.
They include the three phenanthrene rings as well as a five-membered cyclopentane (D) ring.
The saturated derivative of phenanthrene is called a perhydro phenanthrene (rings A, B, and C).
To explain the numbering system for a steroid, the polycyclic hydrocarbon 5-α-cholestane is used.
In the structure of 5α-cholestane, the ring carbons are shown by a thick, dark line.
Groups above the plane of the nucleus are shown by solid lines known as β-configuration, and groups below the plane are indicated by dotted lines known as α-configuration.
A C = C bond in a steroid is frequently denoted by the symbol Δ. A molecule is referred to as a Δ4 steroid" if the C = C bond is located between carbons 5 and 4, and a Δ5(10) steroid" if it is located between carbons 5 and 10.
example - Estra-Δ1,3,5(10) triene-3,17Beta-diol
