Which Statement About Contraception Is True

question 113

Multiple Choice

Which statement about contraception is true?

• A) An intrauterine device (IUD) prevents implantation by blocking prostaglandins.
• B) The progestin-only pill causes breakdown of the endometrium.
• C) Cervical caps and condoms have about the same failure rate, and both protect against sexually transmitted diseases.
• D) Mifepristone (RU-486) prevents implantation by blocking the action of progesterone.
• E) A couple using the rhythm is likely to have a 95 percent success rate at preventing pregnancy.

---

Definitions:

Characteristic Stretching

The unique vibration of molecular bonds within a molecule, used in infrared spectroscopy to identify specific functional groups.

Frequency

The number of cycles or vibrations per unit of time; in physics and chemistry, it often relates to the energy levels of atoms and molecules.

Least Intense

Describes the weakest signal or effect in a set of data or spectral analysis, often indicative of low concentration or sensitivity.

Stretches

In spectroscopy, refers to the vibrational movements (stretching and bending) of molecular bonds that are studied to identify functional groups in molecules.