Endocrine System 1, Exocrine and endocrine glands

An endocrine gland is one which;
a. Secretes a product via a duct
b. Secretes a product directly into the blood for systemic distribution. *
c. Secretes a product into the gastrointestinal tract
d. Secretes a product onto the surface of the skin

An endocrine gland is a gland which releases a product directly into the;
a. Lymphatic fluid
b. Blood. *
c. Gastrointestinal tract
d. Bile

Which of the following is an exocrine gland?
a. Pituitary gland
b. Thyroid gland
c. Kidney
d. Salivary gland. *

Physiologically, a hormone can be considered as a;
a. Receptor molecule
b. Signal molecule. *
c. Secondary messenger system
d. Enzyme

The combination of a hormonal signal molecule and its receptor molecule together will;
a. Always result in the formation of a protein
b. Always result in the formation of an enzyme
c. Initiate extracellular primary messenger systems
d. Initiate intracellular secondary messenger systems. *