BIPN 100 Lecture Notes - Lecture 20: Oncotic Pressure, Sympathetic Nervous System, Vasoconstriction

38 views7 pages

Document Summary

Some vasoactive paracrines are related to inflammation (kkinins, histamine, serotonin) Smooth muscle senses oxygen/co2 concentration levels, leads to vasodilation to increase blood flow: sympathetic branch controls most vascular smooth muscle, cardiovascular control, use baroreceptors (based on pressure, baroreceptor reflex. Feedback loop to lower blood pressure: high blood pressure activates baroreceptors which sense pressure increase in arteries and aorta. Sensory neurons transmit to medulla oblongata: decrease sympathetic output (less norepinephrine), and increase parasympathetic output (more ach on muscarinic, decrease hr via sa node and weakening contraction (decrease cardiac output). Shock: sphincters all relax, so lose a lot of blood volume to the capillaries. Lack of blood in main organs/heart/brain: velocity of blood flow. Some vesicles may also fuse to create temporary channels. Still a net flow out of 3l/day: blood needs to be reclaimed by vasculature system to avoid edema (swelling in ankles, reclaiming happens by lymph capillaries in tissue spaces.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents