What type of animal hormones are cortisone and progesterone?

$A$ molecule that binds to a receptor and induces post-receptor events in a cell is called ...$A$... and a molecule that binds to the receptor and inhibits all post-receptor events is called ...$B$....

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.

What is correct to say about the hormone action in humans?

Who proposed the term '$pheromone$'?

Which of the following is a "second messenger"?