HLSC 1200U Study Guide - Quiz Guide: Guanosine Triphosphate, Adenylyl Cyclase, Adenosine Triphosphate
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Write out the answers to these questions after reading the chapter and reviewing the chapter summary. Identify the functions of three of these classes. Answers: a hormone is a regulating substance secreted by an endocrine gland. A target cell is any cell with one or more receptors for a particular hormone: all steroid hormones have a cholesterol molecule at their core. The hormone joins a receptor on the cell membrane. This hormone-receptor complex causes a membrane protein called the g protein to bind to a nucleotide called guanosine triphosphate. This activates a second membrane protein called adenyl cyclase. This is an enzyme that promotes the removal of two phosphate groups from an adenosine triphosphate (atp) molecule in the cytosol. The product of this is camp, which acts as a second messenger within the cell. camp activates protein kinases, which are a set of enzymes that activate other types of enzymes.
