Consider the following tibial nerve conduction velocity (NCV…
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
Read DetailsYou are evoking muscle twitches by stimulation in your physi…
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].
Read DetailsHere is a typical action potential from a neuron that you ar…
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?
Read DetailsA patient who is hemorrhaging has pale mucous membranes, blo…
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?
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