SC BIOL 460 - Blood Pressure and Respiratory System (3 pages)

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Blood Pressure and Respiratory System

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Blood Pressure and Respiratory System


Blood Pressure and the Respiratory system, which includes respiration, the lungs, the diaphragm and Boyle's Law

Lecture number:
Lecture Note
University Of South Carolina-Columbia
Biol 460 - General Physiology
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BIOL 460L 1st Edition Lecture 26 Outline of Last Lecture I Blood Flow II Regulation of Blood Flow in ANS III Paracrine Regulation of Blood Flow IV Autoregulation Outline of Current Lecture I Blood Pressure a Hypertension II Respiratory System a Respiration b Lung c Diaphragm d Boyle s Law Current Lecture Blood Pressure 1 Squeeze a Upstream pressure increases b Downstream pressure decreases 2 Squeeze caused by resistance vessels arterioles 3 Arterial BP Cardiac Output PR 4 Long term BP regulated by kidneys regulate blood volume and sympathoadrenal system 5 Short term BP regulated by baroreceptor reflex a Orthostatic hypotension b Stand quickly and get dizzy c Slow baroreceptor reflex makes it worse d Baroreceptors aortic arch carotid sinus where carotid branches e Baroreceptors are constantly generating APs f Higher pressure more APs g Send sensory information to medulla vasomotor center vasoconstriction dilation and cardiac center heart rate contractility h Beta blockers prevent this reflex syncope pass out 6 Sphygmomanometer blood pressure cuf a Measured in mmHg b Listening for Sounds of Kortkof 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 c d e f Listen at Brachial Artery Increase in pressure above systolic pressure about 140mmHg Squeeze brachial artery shut no sound Pressure decreases until it s just below systolic pressure every systole produces a surge of blood first sound of kortkof g Sound disappears diastolic pressure 7 Hypertension a High blood pressure b 1 5 of Americans c Secondary high BP as a result of a known cause ex atherosclerosis of renal artery d Primary essential Idiopathic poorly understood cause e 120 80 or less no hypertension f Treating hypertension i Reduce stroke volume thiazide diuretic ii Beta 1 blocker slows heart rate and contractility decreases iii Lose weight which drops blood vessel length iv Vasodilators block alpha 1

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