Which layer covers the external surface of the heart and produces serous fluid for lubrication?

Testosterone, estrogen, progesterone, and corticosteroids are all classified as what kind of hormones?

BONUS (up to 3 points): Which neurotransmitter is responsible for helping us to stay asleep?  What do we often use to stop this from working?

What hormone is secreted by delta cells in the pancreas?

What are the three main classes of hormones based on their chemical structure?

What is the name of the inner layer that lines the inner surfaces of the heart, including the heart valves?

Antidiuretic hormone (ADH) causes vasoconstriction to elevate blood pressure. It also causes the kidneys to retain water, preventing a decline in blood volume. What effect does ADH have on blood pressure?

Which of the following accurately describes the anatomical location of the heart in the human body?

Which type of capillary is the most common in the body?

Which of the following are the smallest and thinnest blood vessels, composed only of a tunica interna made up of endothelium and a basement membrane?