SC BIOL 460 - Final Exam Study Guide (3 pages)

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Final Exam Study Guide

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Final Exam Study Guide


Possible Essay Questions/Topics for the Final Exam

Study Guide
University Of South Carolina-Columbia
Biol 460 - General Physiology
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BIOL 460 1nd Edition Final Exam Study Guide Lectures 24 34 Possible Essay Questions 1 Platelet Release Reaction When a vessel is damaged there is a rupture in the endothelium and underlying tissue is exposed lots of collagen Platelets have proteins that stick to collagen Von Willibrands Factor VWF is a protein that is produced by endothelial cells which help platelets adhere to collagen This causes the platelet release reaction Degranulation occurs and vesicles undergo exocytosis fusing with the plasma membrane Thromboxin A2 prostaglandin and ADP are released Thromboxin A2 helps the platelets stick and is a vasoconstrictor while ADP makes the platelets sticky Growth factors are released to speed the repair of connective tissue Tissue factor is released and is important in clotting 2 Renin Angiotensin aldosterone System The kidneys contain juxtaglomerular apparatus that secretes Renin Low blood volume occurs when the kidneys are not getting enough blood at a high enough pressure to produce filtrate properly Granular cells of JGA secrete renin into blood Renin converts angiotensinogen angiotensin I plasma protein produced by liver Angiotensin ACE Angiotensin II ACE angiotensin converting enzyme AII raises blood pressure and blood volume negative feedback for renin The following are functions of Angiotensin II powerful vasoconstrictor raising BP causes adrenal cortex to secrete aldosterone mineralocorticoid and stimulates thirst centers 3 Starling s Forces in pulmonary circuit renal corpuscle systemic capillaries Starling s forces are forces that cause filtration In the pulmonary there is low pressure and low resistance Pulmonary hypertension would cause pulmonary congestion due to failure of the left ventricle A heart attack can cause pulmonary edema which is accumulation of fluid in lungs Edema is excess accumulation of tissue fluid 4 Baroreceptor Reflex Baroreceptor reflex regulates short term blood pressure Occurs when you stand quickly and get dizzy A slow

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