Question

Hormone term was coined in 1905 by-
A) E.H.Starling
B) G.W. Harris
C) E.H. Schally
D) None of the above

Answer 1

Endocrinology deals with the structure and function of hormones secreted by glands, deals with disorders caused by over and under expression of hormones. Hormones are defined as the chemical messengers that are secreted directly into the blood and then further carried to cells or tissues for their functions. It was first discovered through the secretion of the Pancreas.

Complete answer:
Hormone term was coined in 1905 by E.H. Starling. Hormones are chemical messengers that are released into body fluids and carry chemicals to their target cells.
According to circulation, there are two basic types of hormones-
Local Hormone - They act on neighboring cells and even on the same cells.
Circulating hormone- These are rare hormones. They pass from the secretory cells and enter into a target cell which is located at a distance.
These can be also defined based on their chemical structure. These are of three types-
Lipid-derived hormones - These are derived from the cholesterol. The steroid hormones Male and female hormones are examples.
Amino acid-derived - These are derived mostly from Tryptophan and Tyrosine. Epinephrine and norepinephrine(Adrenal hormones) are examples of this type.
Peptide hormones- These are derived from short polypeptide chains. The examples include Oxytocin and Antidiuretic hormone(Vasopressin).

So, the correct choice is an option (A).

Note:
Some important information regarding the work and discoveries of above mentioned scientists are as under-
Ernest Henry Starling discovered a signalling molecule from pancreatic secretions and hence named it a hormone. Hormone activity takes place with the help of stimulus which can be a negative or positive stimulus.
G.W. Harris is also concerned with endocrinology but he is termed as the father of neuroendocrinology.