What are chemical messengers ?

What are the substances which mimic the natural chemical messengers ?

________ are the chemical messengers that are secreted into the blood directly.

Pheromones are chemical messengers that help insect in (a) Communication (b) Sending alarm signals (c) Marking trails (d) Attracting males (e) Killing pests

Why are hormones referred to as chemical messengers?

What are hormones? Why are they called chemical messengers? What are the general properties of hormones?

Arrange the following mechanism of receptor and chemical messenger in the correct order I.Receptor regains structure after removal of chemical messengers II.Receptor receives chemical messenger III.Shape of receptor changed after attachment of messenger Choose the correct option

The chemical messengers produced in ductless glands are called: