Emerging viruses arise by
a) the spread of existing viruses more widely within their host species.
b) mutation of existing viruses.
c) the spread of existing viruses to new host species.
d) all of the above
e) none of the above
Ans: d) all of the above
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Glucose is removed in the proximal convoluted tubules. Therefore, glucose is not expected to be found in a normal urine sample. However, glucose is found in the urine of diabetics
Why is this the case? A) More glucose can pass into the nephron because the concentration of the glucose in the blood is very high. B) The transport of glucose from the pre-urine back to the blood cannot occur at a rate fast enough to remove all of the glucose from the urine. C) Glucose is passing from the blood surrounding the nephron and into the pre-urine. D) Diabetics have active transport of glucose from the blood into the pre-urine when blood glucose levels become very high.
When runoff containing excessive nutrients enters streams and lakes it can result in an overgrowth of cyanobacteria and algae, a process known as
A) eutrophication. B) oxidation. C) fixation. D) ammonification. E) both ammonification and fixation.
The subjective evidence of disease sensed by the patient is termed
A. inflammation. B. pathology. C. syndrome. D. symptom. E. sign.
Although membrane proteins contribute roughly 50% of the total mass of the membrane, there are about 50 times more lipid molecules than there are protein molecules in cellular membranes. Explain this apparent discrepancy
What will be an ideal response?