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06 May 2020, 02:17
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
57% (02:42) correct
43%
(02:46)
wrong
based on 511
sessions
History
Date
Time
Result
Not Attempted Yet
Multiple sclerosis is an autoimmune disease: white blood cells attack the myelin sheath that protects nerve fibers in the spinal cord and brain. Medical science now has a drug that can be used to successfully treat multiple sclerosis, but the path that led medical researchers to this drug was hardly straightforward. Initially, some scientists believed attacks characteristic of multiple sclerosis might be triggered by chronic viral infections. So in 1984 they began testing gamma interferon, one of the body’s own antiviral weapons. To their horror, all the multiple sclerosis patients tested became dramatically worse. The false step proved to be instructive however.
Which of the following is LEAST compatible with the results of the gamma interferon experiment?
(A) Gamma interferon stops white blood cells from producing myelin-destroying compounds.
(B) Administering gamma interferon to those without multiple sclerosis causes an increase in the number of white blood cells.
(C) Medical researchers have discovered that the gamma interferon level in the cerebrospinal fluid skyrocket just before and during multiple sclerosis infections.
(D) It has now been established that most multiple sclerosis sufferers do not have chronic viral infections.
(E) The drug now used to treat multiple sclerosis is known to inhibit the activity of gamma.
MS is an autoimmune disease in which WBCs attack the myelin sheath that protects nerve fibers in the spinal cord and brain.
Scientists believed that perhaps chronic viral infections triggered MS
Testing of GI, one of the body’s own antiviral weapons, made the patients' condition even worse.
It can be inferred from the GI experiment that GI did not help stopping WBC attacks but facilitated it in some way.
(A) Gamma interferon stops white blood cells from producing myelin-destroying compounds.
No, if it were true the experiment would have been successful in treating the MS patients. CORRECT
(B) Administering gamma interferon to those without multiple sclerosis causes an increase in the number of white blood cells.
This is quite possible. If the GI experiment made the MS patients' condition worse then its likely that it did so by increasing the number of WBCs
(C) Medical researchers have discovered that the gamma interferon level in the cerebrospinal fluid skyrocket just before and during multiple sclerosis infections.
I do not see how this is relevant to the argument
(D) It has now been established that most multiple sclerosis sufferers do not have chronic viral infections.
This is what the experiment results tell us, that the MS is not triggered by viral infection.
(E) The drug now used to treat multiple sclerosis is known to inhibit the activity of gamma.
No wonder the GI made the condition worse.
Option A does not seem compatible with the GI experiments.
Scientists believed that perhaps chronic viral infections triggered MS
Testing of GI, one of the body’s own antiviral weapons, made the patients' condition even worse.
It can be inferred from the GI experiment that GI did not help stopping WBC attacks but facilitated it in some way.
(A) Gamma interferon stops white blood cells from producing myelin-destroying compounds.
No, if it were true the experiment would have been successful in treating the MS patients. CORRECT
(B) Administering gamma interferon to those without multiple sclerosis causes an increase in the number of white blood cells.
This is quite possible. If the GI experiment made the MS patients' condition worse then its likely that it did so by increasing the number of WBCs
(C) Medical researchers have discovered that the gamma interferon level in the cerebrospinal fluid skyrocket just before and during multiple sclerosis infections.
I do not see how this is relevant to the argument
(D) It has now been established that most multiple sclerosis sufferers do not have chronic viral infections.
This is what the experiment results tell us, that the MS is not triggered by viral infection.
(E) The drug now used to treat multiple sclerosis is known to inhibit the activity of gamma.
No wonder the GI made the condition worse.
Option A does not seem compatible with the GI experiments.
06 May 2020, 16:07
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Quote:
argument
=ms is caused by wcells destroying myelin that protects nerve
=some thought these attacks wer trig by chronic viral infec
=so they tested gamma drugs on ms patients
=ms patients got worse!
least compatible with gamma results
ans (A) if gamma stopped wcells from destroying myelin, then they would have found a cure!
