A5-year-old child with a ventricular septal defect (vsd) is scheduled for cardiac catheterization. the parents ask the nurse why this test is being done. while formulating a reply, what does the nurse recall is the function of the test?

The medical procedure Cardiac catheterization that cardiologist or specialist of the heart usually evaluate heart function and diagnose conditions like cardiovascular. In Cardiac catheterization, a long small tube called a catheter is inserted into the artery or vien in the groin, neck or arm. 

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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