Steroid hormones are:

The word "hormone" means

Which of the following statements are applicable to hormones?
$I -$ Neural messengers
$II -$ Intercellular messengers
$III -$ Produced in trace amounts
$IV -$ Nutrient chemicals
$V -$ Released into the blood after production.

Given below are two statements.
Statement $I$: Mode of action of catecholamines,peptide and polypeptide hormones is through cell membrane receptors.
Statement $II$: These hormones are non-steroid,water soluble and lipid insoluble hormones.
In the light of above statements,choose the correct option from below:

Who proposed the term '$pheromone$'?

Receptors for protein hormones are located on the.....