Transplanting Animal Tissues and Organs into Humans Is Called Xenotransplantation

question 32

Multiple Choice

Transplanting animal tissues and organs into humans is called xenotransplantation. Which of the following is one difference that makes this process problematic?

• A) Animal cells produce amino acids that humans do not produce.
• B) Animals cells produce proteins foreign to human cells.
• C) Human cells can be infected with bacteria found in animal cells.
• D) Human cells and animal cells cannot be fused.
• E) Animals cells produce sugar that human cells do not produce.

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Definitions:

Cohesion

Property of a substance (such as water) that arises from the tendency of its molecules to resist separating from one another.

Osmosis

Diffusion of water across a selectively permeable membrane; occurs in response to a difference in solute concentration between the fluids on either side of the membrane.

Sieve Elements

Living cells that compose sugar-conducting sieve tubes of phloem. Each sieve tube consists of a stack of sieve elements that meet end to end at sieve plates.

Osmosis

The movement of water molecules through a semipermeable membrane from a region of lower solute concentration to higher concentration.