Consider the following tibial nerve conduction velocity (NCV) test results below. A unique feature of distal limb motor neurons is that the axons taper abruptly in the lower extremities. What is the best explanation for why these average NCVs are decreasing with increasing height? Height (in) Mean NCV (m/s) < 5’3” 51 5’3” – 5’7” 49 > 5’7” 47  

You are evoking muscle twitches by stimulation in your physiology lab. You begin to see muscle contractions and successfully are able to evoke a twitch with each stimulation. Next, you increase the stimulation frequency to a more moderate level (3-5 Hz) and you now begin to see  [answer1] occurring in your recording. Seeing this means that [answer2].

Ultimately, we found no difference between nerve conduction velocity (NCV) and hand dominance from the class data. What is the BEST explanation for this?

In a clinical setting, a physician conducts a nerve conduction velocity test to examine a patient’s medial nerve. What answer would support a positive diagnosis of carpal tunnel syndrome? 

Here is a typical action potential from a neuron that you are recording in lab:    Your lab partner applies a drug to that neuron. According to the label, it completely blocks all functions for one specific protein, but the label is damaged and doesn’t say which protein. The next action potential you record looks like this: Which of the following proteins has been targeted by the drug?

Permanent mandibular first molars typically erupt before permanent central incisors.

Which is the leading cause of death among the middle-adult age group?

A patient who is hemorrhaging has pale mucous membranes, blood pressure 92/52 mm Hg, pulse 160 beats/minute, and respirations 30/minute. The patient is receiving IV fluids at 150 mL/hour, has a blood transfusion infusing, and is being provided oxygen via a mask. What should the nurse recognize as the most likely cause of the patient’s respiratory rate?

Which of the following is not a factor in causing tooth movement?

There are a total of eight incisors in the deciduous dentition.