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NR 565 MidTerm Review-guide

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1. G-Protien coupled receptors and how they interact with drugs G-protein coupled receptors (GPCR) interact with drugs through 7 regions of proteins that span and innervate the cell membrane, and tr ... ap the molecule into the receptor site like an interwoven basket (Insel & Sriram, 2018). Drugs can then enter this space and interact with the GRCP. A specific interaction and binding with a site on one or more of the regions of proteins within the GPCR, and drugs bound with the GRCP can stimulate the release of G proteins that can interact with various effector proteins to create physiological responses within the body (Insel & Sriram, 2018). This process occurs through secondary messengers (such as cAMP) which creates the extracellular interactions produced by the drug binding to the GRCP. 2. What neurotransmitters are excitatory? amino acids such as glycine, aspartate, and glutamate are excitatory (Woo & Robinson, p.16, 2016). 3. Which is the most common CYP enzyme in the body? What role does it play? According to the textbook, the CYP3A4 is the most important enzyme in the body. CYP3A4 is responsible for the metabolism of more than 50% of medications and is considered a major drug metabolizing enzyme. CYP3A4 can be found in the liver, as well as the lining of the GI tract. Due to this location, food can also influence this CYP. One example of this is grapefruit juice, which can inhibit CYP3A4. Medications that are metabolized by CYP3A4 include antimicrobials, calcium channel blockers, antihistamines, anticonvulsants, azole antifungals, and corticosteroids (Woo, & Robinson, 2016). [Show More]

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