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BIOL 1840U (44)
Lecture

CNS Regulation of CV System

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School
Department
Biology
Course
BIOL 1840U
Professor
Peter Cheung
Semester
Fall

Description
Outline of Lecture 41 (05-23 A) CNS Regulation of CV System There are two types of CNS circulatory regulation - Reflex: responding to circulatory needs - Anticipatory: predicting circulatory needs REFLEX Baroreceptor regulation - Baroreceptors located in carotid sinus (glossopharyngeal n.) and aorta (vagus n.) - Most sensitive in range of 60-120 mmHg - Regulation occurs in medulla Parasympathetic effects - ACh onto muscarinic receptors on cardiac pacemakers slows depolarization and decreases heart rate - Fast effect ↓arterial P  ↓baroreceptor discharge  ↓parasymp tone  ↓ACh release  ↑pacemaker depol speed  ↑heart rate Sympathetic effects increase CO - NE onto β1 receptors on cardiac pacemakers speeds depola
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