BIO 12 Lecture Notes - Lecture 24: Cyclic Adenosine Monophosphate, Posterior Pituitary, Aquaporin
Document Summary
Intracellular receptors: cytoplasmic/cytosolic or nuclear, bind hydrophobic (lipophilic or lipid-soluble) hormones, diffuses into the plasma membrane, directly alter gene transcription, slower response; involve so many steps and make a new protein off it. Membrane-bound receptors: g-protein linked receptors, found on the cell surface, ligand-gated ion channels, bind hydrophilic (lipophobic or non-lipid soluble) hormones, rapid responses. Answer: the presence of a receptor for that particular hormone. Hormones encounter multiple cell types throughout the body. The presence of a receptor makes the cell responsive to hormone. Hormones relay information to cells through the receptors (but do not themselves carry out a target effect) by binding to specific receptors. Hormones are chemical messengers that produces responses in target cells. Hormones can bind various classes of receptors, resulting in different. Receptor response is dependant on receptor shape and quantity. Responses vary depending on strength and types of stimuli. Responses rely on changes to enzyme activity intracellularly. Lies at the base of the 3rd ventricle.
