cardio

100 Pins
·
3mo
The sympathetic system evokes "fight-or-flight" response: pupils dilate, muscle vasculature dilates, the heart rate increases, and the digestive system is put on hold. The parasympathetic system evokes "rest-and-digest" responses, including slowing the heart, constricting the pupils, stimulating the gut and digestive organs and salivary glands, and other responses. The parasympathetic uses acetylcholine as its chemical messenger, while the sympathetic uses norepinephrine.
Physiology Glossary: Baroreceptor Reflex
Blood pressure (specifically, Mean Arterial pressure (MAP), which is the driving force for blood flow, is regulated by two main mechanisms: • The Baroreceptor Reflex, which is fast-acting (within seconds) and acts via changes in – • Cardiac Out
The sympathetic system evokes "fight-or-flight" response: pupils dilate, muscle vasculature dilates, the heart rate increases, and the digestive system is put on hold. The parasympathetic system evokes "rest-and-digest" responses, including slowing the heart, constricting the pupils, stimulating the gut and digestive organs and salivary glands, and other responses. The parasympathetic uses acetylcholine as its chemical messenger, while the sympathetic uses norepinephrine.