CAS BI 108 Chapter Notes - Chapter 45: G Protein–Coupled Receptor, Paracrine Signalling, Adrenal Gland
Document Summary
Describe hormones and different hormone signaling mechanisms. Understand how hormone systems act and are regulated. List glands that compose the endocrine system. Provide examples of hormones and their biological roles. Hormones are signaling molecules that are secreted into extracellular fluids at low concentrations and that can regulate many distinct aspects of biology. The coordination of hormone responses is governed by the endocrine system and the nervous system. Communication between cells is an important function of hormones. In addition to endocrine signaling, signals can act at a distance through synaptic signaling. 45. 1 hormone signaling signaling these hormones move through the blood, allowing them to regulate metabolic properties and responses to environmental stimuli throughout the body. By contrast, many cells produce molecules that act via paracrine signaling, triggering a response in only nearby cells, or via autocrine signaling, acting on the cell that secreted those same signaling molecules.
