DAANCE Exam Practice Questions and Answers

Wave of Depolarization an advancing wave of charge reversal as the nerve impulse advance a long the neuron Wakefullness system consists of a central core in the brainstem with neurons that radiate to the cortex Vomiting Center the center in the brainstem that induces vomiting Vital Centers centers in the brainstem that control such physiologic processes as blood pressure and pulse, depth and rate of respiration Vestibular nerve part of the eighth cranial nerve that is connect with equilibrium and hearing Venule any of the small vessels that collect blood from networks of capillaries and join them to form veins Ventricular tachycardia a cardia dsrhythmia in which there is rapid firing of an ectopic focus in the ventricles and a wide QRS complex with no p waves Ventricular rhythms a cardia dsrhythmia in which the pacemaker is in the ventricles rather than in the SA node or atria Ventricular focus a displace point of origin for a dysrhythmia that is in the ventricles Ventricular fibrillation arrhythmia characterized by contractions of ventricle muscle fibers due to rapid excitation of myocardial fibers without coordinated contraction of the ventricle Sensory nerve a nerve of the peripheral nervous system that conducts impulses from a sense organ to the spinal cord or brain Sinoatrial node a microscopic collection of heart muscle fibers where cardiac rhythm originates; also called the pacemaker of the heart Sinus arrhythmia a cardiac dysrhythmia similar to normal sinus rhythm, but withslight variation in rate with inspiration and expiration