Cardiovascular Physiology- Regulation of heart rate- Part II- Pressor- Sympathetic triggers скачать в хорошем качестве

Cardiovascular Physiology- Regulation of heart rate- Part II- Pressor- Sympathetic triggers

Welcome to Part II of our comprehensive series on the Regulation of Heart Rate. In this video, we dive deep into the Sympathetic Nervous System and explore the "Pressor" triggers—stimuli that accelerate the heart rate and increase cardiac output. Building on our previous discussion of parasympathetic (vagal) control, this lecture focuses on the "Fight or Flight" response. We will break down exactly how the body responds to stress, exercise, and emergencies to maintain hemodynamic stability. ⏱️ Topics Covered in This Lecture: Major Sympathetic (Pressor) Triggers: The Chemoreceptor Reflex: The heart's response to hypoxia, hypercapnia, and acidosis. The Bainbridge Reflex: The fascinating link between atrial volume and heart rate. Exercise & Central Command: Anticipatory heart rate elevation before physical movement even begins. Emotional Stress & Pain: The limbic system's influence on the cardiovascular center.