DAANCE Exam

DAANCE Exam Wave of Depolarization - ANSWER an advancing wave of charge reversal as the nerve impulse advance a long the neuron Wakefullness system - ANSWER consists of a central core in the brainstem with neurons that radiate to the cortex Vomiting Center - ANSWER the center in the brainstem that induces vomiting Vital Centers - ANSWER centers in the brainstem that control such physiologic processes as blood pressure and pulse, depth and rate of respiration Vestibular nerve - ANSWER part of the eighth cranial nerve that is connect with equilibrium and hearing Venule - ANSWER any of the small vessels that collect blood from networks of capillaries and join them to form veins Ventricular tachycardia - ANSWER 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 - ANSWER a cardia dsrhythmia in which the pacemaker is in the ventricles rather than in the SA node or atria Ventricular focus - ANSWER a displace point of origin for a dysrhythmia that is in the ventricles Ventricular fibrillation - ANSWER arrhythmia characterized by contractions of ventricle muscle fibers due to rapid excitation of myocardial fibers without coordinated contraction of the ventricle Sensory nerve - ANSWER a nerve of the peripheral nervous system that conducts impulses from a sense organ to the spinal cord or brain Sinoatrial node - ANSWER a microscopic collection of heart muscle fibers where cardiac rhythm originates; also called the pacemaker of the heart sinus arrhythmia - ANSWER a cardiac dysrhythmia similar to normal sinus rhythm, but withslight variation in rate with inspiration and expiration sinus bradycardia - ANSWER cardiac dysrhythmia similar to normal sinus rhythm except for a slower rate of less than 60 bpm sinus rhythms - ANSWER cardiac rhythms in which the pacemaker is the sinoatrial node sinus tachycardia - ANSWER dysrhythmia similar to normal sinus rhythm except for an increase in rate of greater than 100 bpm but less than 150 bpm stroke volume - ANSWER the amount of blood ejected from a ventricle during each beat of the heart subcutaneous - ANSWER beneath the skin superior vena cava - ANSWER the venous trunk that drains blood from the head, neck, upper extremities, and chest and empties into the right atrium of the heart supraventricular foci - ANSWER central points of origin of dsrhythmias, which are located above the level of the ventricles in the atria sympathommimetic - ANSWER having activity that mimics the effects of the sympathetic nervous system, epinephrine