What Is One Way in Which the IUD Works

question 49

Multiple Choice

What is one way in which the IUD works?

• A) It releases spermicide when inserted into the vagina.
• B) It prevents the ovum from reaching the fallopian tube.
• C) It prevents the passage of the zygote into the uterus.
• D) It contains a progesterone-like hormone that thickens the cervical mucus so sperm cannot pass through.

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Definitions:

Denitrification

A microbial process that converts nitrate in the soil to nitrogen gas, releasing it into the atmosphere and reducing soil fertility.

Nitrification

A microbiological process by which ammonia is oxidized to nitrate ions, an essential step in the nitrogen cycle.

Nitrogen Fixation

The process by which atmospheric nitrogen is converted into a form usable by plants, often facilitated by bacteria.

Assimilation

The process by which living organisms integrate nutrients from their environment into their own biological processes.