Concept #1: Structural Classifications of Hormones
Concept #2: Mechanism of Action of Catecholamines and Proteins
Concept #3: Mechanism of Action of Steroids and Thyroid Hormone
Practice: A 20-year-old college student looks across a lecture hall and makes eye contact with a beautiful girl. She smiles at him—a stunning, luminous, mesmeric smile. Time slows. He falls in love immediately. During this brief period of excitement, his heart rate increases. Which of the following class of hormones likely mediated this sudden increase in heart rate?
Practice: A 12-year-old male notices that his body is changing. Specifically, he’s noticed that, over the past year or so he’s started growing hair under his arms, around his genitals, and on his upper lip. Over the coming year he notices that his voice deepens and that he has a tendency to get sudden, often unwanted erections. Which of the following class of hormones is likely mediating this steady cascade of changes in his physiology?
Practice: Anti-Diuretic hormone (ADH) is a hormone released from the anterior pituitary. It binds to receptors on the surface of kidney collecting duct cells. Which of the following correctly identifies both the likely hormone class to which ADH belongs and the time course on which it acts?
Practice: Cortisol is a hormone released from the adrenal cortex. It binds to intracellular receptors in cells throughout the body. Which of the following correctly identifies both the likely hormone class to which cortisol belongs and the time course on which it acts?