本题目来源于试卷: Continuity and Change D.6 Water Potential，类别为 IB生物学
[单选题]
An organ donor's heart is removed to a-d:h5zm 1mko bex 9lp4d* qyu7t transplanted and is stored in an isotonic solution prior to transplant. Which of the following may result if the heart is not storedqx7y9* lt 4pud in an isotonic solution?
A. Water will diffuse into the cardiac muscles.
B. There will be no net movement of water into heart tissues.
C. The heart will dry out.
D. The recipient’s immune system may reject the heart.
参考答案: A
本题详细解析:
Choice A is correct because if the heart were placed in a hypotonic solution (as opposed to isotonic) water would diffuse into the cardiac muscles. Choice B is incorrect because there would be no net movement into the tissues of the heart in an isotonic solution, not a hypotonic or hypertonic solution. Choice C is incorrect because even if it is placed in a solution other than an isotonic solution, it cannot dry out as it is still bathed in a watery solution. Choice D is incorrect as the tonicity of the solution the heart is stored in has no effect on whether the recipient’s immune system identifies the heart as foreign which would lead to rejection of the heart by the immune system.
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