Why is back pain so common in humans? What will be an ideal response?
Unlike the vast majority of other vertebrates, humans are upright walkers. As a result, the
intervertebral disks which were intended primarily to all flexibility between the vertebrae have now
become weight-bearing structures. They are often not up to the task and more or rupture. This can
result in an impingement on the nerves of the spinal cord and chronic pain.
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C3b is involved in
A. opsonization. B. interferon production. C. properdin activation. D. endotoxin production.
Lysosomes function best at a pH of ____
a. 7.4 b. 6.5 c. 3.2 d. 5.0 e. 8.2
Why is it inaccurate to refer to early synapsids as "mammal-like reptiles"?
A) Mammals did not evolve from synapsids. B) Synapsids do not nest within the clade Reptilia as we define it now. C) The taxon Synapsida is actually polyphyletic. D) The earliest synapsids had no features that we associate with reptiles today. E) Synapsids and reptiles lived on different continents in the late Paleozoic.
You observe that a neuron treated with a metabolic inhibitor which prevents ATP generation still can generate action potentials even when the cell has little ATP, but the neuron eventually loses the ability to generate action potentials
What does this tell you about the direct mechanism for regenerating the resting potential after an action potential? What will be an ideal response?