BSNC 1000 – PERFUSION QUESTIONS & ANSWERS 100% CORRECT

Radius - ANSWER Biggest affect on blood flow through a vessel Activation of Sympathetic NS - ANSWER - Decreases vessel diameter - Increases CO - Increases TPR Perfusion - ANSWER The supply of oxygen to and removal of wastes from the cells and tissues of the body as a result of the flow of blood through the capillaries. Arterial System - ANSWER Distributes blood and regulates pressure Capillary beds - ANSWER Transfer of materials between circulation and tissues Venous System - ANSWER Returns blood to heart volume reservoir Scope of Perfusion - ANSWER Optimal - Impaired - No Perfusion Ischemia (cell injury) - ANSWER Impaired perfusion Infarction (cell death) - ANSWER No Perfusion Blood Pressure - ANSWER Force of blood against the walls of blood vessels Systolic Pressure - ANSWER BP during systole - ventricles contract MAP = - ANSWER CO x TPR MAP ≈ - ANSWER Diastolic Pressure - 1/3(Partial Pressure) Blood Volume Influenced By: - ANSWER -sodium ingestion and excretion -renin/aldosterone Vasoconstriction Influenced By: - ANSWER - Autonomic NS - Kidney renin/angiotensin - Adrenal medulla hormones Cardiac Output Influenced By: - ANSWER - BPM - Volume of blood Peripheral Resistance Influenced By: - ANSWER - Vasoconstriction - Vasodilation - Local Factors (pH, hypoxia) - Sympathetic stimulation of smooth muscle of vessel walls