Sympathetic Nervous System | Overview of Specific Pathways
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- เผยแพร่เมื่อ 21 ส.ค. 2024
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I have truly been looking everywhere for a video that explains this concept, that was seemingly too complex for my understanding in one of my medical school lectures last week. So I am truly grateful for this video and the actual breakdown of each part. Thank you so much! Looking forward to seeing one for the parasympathetic system as well! Thank you again!
thanks very much, very good content, as always....waiting for the parasympathetic branch....
Coming soon!
I have a question regarding beta blockers. They are preventing heart rate to increase. They are selective and will influence only on heart (mainly to prevent blood pressure to increase). On which part of the pathway of the neurons beta blockers actually act?
The heart muscle has beta-adrenergic receptors for epinephrine that cause Ca2+ influx when epinephrine binds. The Ca2+ influx causes increase in stroke volume, contractility, and blood pressure. Also, the SA node has adrenergic receptors for epinephrine that cause increases in HR. Beta blockers bind to and block epinephrine from binding, so stroke volume, HR, and blood pressure will be reduced or not rise as much.