SC BIOL 460 - Breathing Regulation and Chemoreceptors (3 pages)

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Breathing Regulation and Chemoreceptors



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Breathing Regulation and Chemoreceptors

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Starling Forces, Regulation of Breathing & Chemoreceptors


Lecture number:
28
Pages:
3
Type:
Lecture Note
School:
University Of South Carolina-Columbia
Course:
Biol 460 - General Physiology
Edition:
1
Documents in this Packet

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BIOL 460 1st Edition Lecture 28 Outline of Last Lecture I Boyle s Law II Spirometer III Lung Diseases a Restrictive b Obstructive IV Gas exchange in Lungs Outline of Current Lecture I Starling s Forces II Regulation of Breathing III Chemoreceptors a central b peripheral c Hypoventilation d Hyperventilation Current Lecture 1 Starling s Forces a Fluid out fluid in BF b Different in pulmonary circuit c BF deltaP R d deltaP 15mmHg 5mmHg 10 mmHg 10 of systemic circuit e Resistance must also be 10 of systemic resistance f Pulmonary low pressure low resistance g 15 0 1 25 11mmHg h 5 0 1 25 21mmHg i Negative indicates inward component is greater more fluid in than out fluid moves from alveoli to blood These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute j If either was positive as in pulmonary hypertension it would cause pulmonary congestion due to failure of L ventricle k Heart attack can cause pulmonary edema accumulation of fluid in lungs fatal in 30 minutes l Systemic Circuit Reactive hyperemia due to Co2 increase which causes pH drop causing vasodilation m Pulmonary arterioles vasodilation with high O2 low CO2 basic pH sends blood to better parts of lungs more diffusion at these parts 2 Regulation of breathing a Brainstem respiratory centers send axons to somatic motor neurons in spinal cord which supply breathing muscles b Responsible for automatic control of respiratory rate c Rhythmicity Area in Medulla Oblongata d Inspiratory Neurons somatic motor neurons for inspiratory muscles e Expiratory Neurons somatic motor neurons for expiratory muscles less important f Have HCN channels generate action potentials at a certain pace g Inspiratory neurons stimulate somatic motor neurons with an EPSP h Expiratory neurons stimulate somatic motor neurons with an EPSP i Inspiratory neurons and expiratory neurons create IPSPs for each other j Most expiration due to elastic recoil k



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