Critics Say Xenografts Had Been Tried Before and Failed

question 2

Multiple Choice

Critics say xenografts had been tried before and failed. Surgeon Leonard Bailey replied that his operation was potentially therapeutic because:

• A) primate hearts had never been tried before.
• B) refinements in classifying antigens made better matches possible.
• C) the Norwood operation had never been tried before.
• D) neonatal intensive care units (NICU's) had been developed since the last time the operation had been tried.
• E) Miniature respirators and pediatric monitors had been recently developed and offered Baby Fae a new advantage.

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Definitions:

Serial Bonds

Bonds that mature at different dates, allowing the issuer to spread out the repayment over time.