Several nursing students are ordering a poster on the mechanism of the heart.
What structure would they label as separating the right half of the heart from the left?
Auricle.
Syncytia.
Bundle of His.
Septum.
The Correct Answer is D
Choice A rationale
The auricle is an ear-shaped appendage on the surface of the atrium and does not separate the right and left halves of the heart. Its function is to increase the capacity of the atrium, allowing for more blood to be collected and passed to the ventricles.
Choice B rationale
Syncytia refer to a multinucleated cell that can result from the fusion of multiple cells, which is not a structure that separates the right and left sides of the heart. They are typically related to muscle tissue and coordinated contractions.
Choice C rationale
The Bundle of His is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches. It does not act as a separator between the right and left halves of the heart.
Choice D rationale
The septum is the structure that separates the right and left halves of the heart. It is a robust wall that divides the atria (interatrial septum) and the ventricles (interventricular septum), ensuring the segregation of oxygenated and deoxygenated blood.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Assessing pulses and blood pressure is crucial before administering an antiarrhythmic agent because these drugs can affect heart rate and blood pressure, requiring close monitoring to prevent adverse effects.
Choice B rationale
While assessing breath sounds is important in overall patient care, it is not the priority before administering antiarrhythmic agents as these drugs primarily affect the cardiovascular system.
Choice C rationale
Assessing mental status is important in patient care, but it is not the priority before administering an antiarrhythmic agent, as these medications primarily influence cardiovascular parameters.
Choice D rationale
Assessing urine output is vital for monitoring kidney function and fluid balance, but it is not the priority before administering an antiarrhythmic agent, which mainly affects heart rhythm and blood pressure.
Correct Answer is D
Explanation
Choice A rationale
Clonic-tonic muscle contraction is related to convulsions and seizures but does not accurately define epilepsy. Epilepsy is a neurological disorder characterized by recurrent seizures due to abnormal electrical activity in the brain.
Choice B rationale
Epilepsy involves abnormal electrical discharges in the brain, not in the muscles. Muscle contractions are a symptom of seizures, not the cause of epilepsy.
Choice C rationale
Epilepsy is not a single disease; it encompasses various conditions characterized by recurrent seizures. It is a spectrum of disorders with different causes and manifestations.
Choice D rationale
This choice accurately describes epilepsy as characterized by sudden, recurrent, and transient disturbances in brain function due to abnormal electrical discharges in the brain.
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