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PHAR 300 Drug Action new 2025 complete Midterm 1 TIPS (Notes KEY CONCEPT) Introduction to Pharmacology and Drug Mechanisms McGill University
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- PHAR 300 Drug Action new 2025 complete Midterm 1 TIPS (Notes KEY CONCEPT) Introduction to Pharmacology and Drug Mechanisms McGill University 
 
Midterm 1 - Notes 
 
Lecture 1 - Welcome to Pharmacology 
 
What is a Drug? 
 
●	Any chemical that affects a living system. Most drug action is on cell membrane receptors, like ion channels, GPCRs, surface receptors. 
●	The two categories are agonists (ex. GLP-1 weight loss drug) and receptor antagonists (ex. Histamine blockers for allergies). 
○	T...
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