The primary purpose of the passage is to treat the accepted generalizations about organ transplantation in which of the following ways?
(A) Explicate their main features
Nope. here the explanations regarding why usually the transplant does not work or has difficult to work out and a new way to implement it thanks to new observations
(B) Suggest an alternative to them
Nope At all
(C) Examine their virtues and limitations
Nothing is said about any limitation. Kind of, a way to bypass such limitations
(D) Criticize the major evidence used to support them
No critics emerged in the passage.
(E) Present findings that qualify them
The right one.
It can be inferred from the passage that the author believes that an important difference among strains of rats is the
(A) size of their livers
(B) constitution of their skin
(C) strength of their immune-response reactions
(D) sensitivity of their antigens
(E) adaptability of their lymphocytes
Quote:
Our hypothesis is that (1) many strains of rats simply cannot mount a sufficiently vigorous destructive immune-response (using lymphocytes) to outstrip the liver's relatively great capacity to protect itself from immune-response damage
C is the best answer. A and B are no way mentioned in the passage. Nor sensistivity or adaptability.
For the
third one the answer is in this sentence of the passage
Quote:
Our hypothesis is that many strains of rats simply cannot mount a sufficiently vigorous destructive immune-response (using lymphocytes) to outstrip the liver’s relatively great capacity to protect itself from immune-response damage
I.E the liver protects itself. As such, it is still the locus or site o the immune system.
For the
fourth one, this is really tough, following the answer's order, we do have
I. Stomach transplants are accepted by the recipients in all cases
This is not true because the answers says that the stomach is accepted in all cases but we do know that in this scenario when rats are transplanted is a case of donor-specific
II. Increasing the strength of the recipient’s immune-response reaction can induce livertransplant rejectionThis is true. We do know that rats have a sort of
donor-specific unresponsiveness, which means that in general takes place the rejection. The rats have this capacity.
III. Organs from any other donor can be transplanted without rejection after liver transplantationthis is not true. We do know that the case is donor-specific NOT any others
IV. Prevailing lymphocytes from being concentrated at the liver transplant produces acceptance of skin transplantsThis is not true. It is exactly the contrary. We do have a concentration of lymphocytes in rats' liver for not having rejection from a specific donor.
Hope this helps
regards
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