Lab Exam 3, Questions and answers, Graded A+

Lab Exam 3, Questions and answers, Graded A+ What are 5 pulse locations and describe location - -1.) Temporal 2.) Facial 3.) Radial 4.) Brachial 5.) Popliteal When identifying a pulse, what else must be considered besides rate? - -Regular equal beats Strength for proper muscle tone If a subjects heart rate was measured at 80 beats/min and blood pressure measured 107/65 mmHg, calculate the following a. Pulse Pressure: Systolic - Diastolic Pressure b. Estimated Stroke Volume: Add 30 to pulse pressure c.) Cardiac Output: Heart Rate x Stroke Volume - -a. 107 - 65 = 42 mmHg b. 42 + 30 = 72ml c. 80 x 72 = 5760 ml/min or 5.8 L/min What factors influence arterial smooth muscle and precapillary sphincters during intrinsic regulation? - -Carbon dioxide Oxygen Temperature PH Histamine What is ischemia and how do arterioles respond to this condition? - -When there is complete interruption of flow in a vessel Arterioles respond through vasodilation How is backflow prevented in the venous system? Can it fail? - -There are valves within the walls of veins to assure one way flow Yes they can fail ( varicose veins) Define Systolic and Diastolic Pressure - -Systolic - Maximum amount of pressure exerted against the wall of an artery (Top number) Diastolic - Minimal amount of pressure exerted against the wall of an artery ( Bottom number) What are Korotkoff sounds? How are they produced? - -Korotkoff sounds are the vibrations of blood flow as a blockage is overcome Produced by systolic and diastolic pressure What is the average resting pulse / heart rate? - -70 -80 bmp