BIOL-2230 Lecture Notes - Lecture 12: Angiogenesis, Oncotic Pressure, Natriuretic Peptide
23 Feb 2017
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Heart processes, blood vessel processes, blood flow, and more. Sympathetic nervous system activation: norepinephrine allows the heart to depolarize faster so action potential is generated, this causes muscles to contract with more force, beats faster and harder. Parasympathetic nervous system activation: acetylcholine hyperpolarizes the sinoatrial node and lowers heart rate. Increases heart rate: strong and short lasting impact. Increases heart rate: weak and long lasting impact. Blood pressure changes: baroreceptors detect change and will increase heart rate when activated. Ionic balances: depolarization disrupts balance, can increase or decrease our heart rate depending on the ion. Age: heart rate declines with aging. Gender: heart rate is higher in women naturally. Exercise: heart rate is up during and after exercise. If you work out regularly, heart gets more efficient. Temperature: fever means increased heart rate. How our body counteracts brief fluctuations in blood pressure. Alter blood distributions based on tissue needs: use capillary sphincters to do this, localized change in blood pressure.
