Cell Phone Users Can Buy a Ringtone Version of a Song

question 125

Multiple Choice

Cell phone users can buy a ringtone version of a song in just a few seconds. This means that somewhere there is a paid worker sitting at a computer using software to edit a digital copy of the original song into a 20-second ringtone. What can you say about this worker?

• A) She is affluent.
• B) She must live in a country that industrialized a long time ago.
• C) She must be very well educated.
• D) She is probably a member of a union.
• E) She is a knowledge worker.

---

Definitions:

Negative Pleural Pressure

The subatmospheric pressure in the pleural cavity that helps keep the lungs inflated.

Surfactant

A substance that tends to reduce the surface tension of a liquid in which it is dissolved, significant in the lungs for preventing alveolar collapse.

Intra-Alveolar Pressure

The pressure within the alveoli of the lungs, critical in the mechanics of breathing and the exchange of gases.

Alveolar Pressure

The pressure within the alveoli, the tiny air sacs in the lungs, which is crucial for the process of breathing and gas exchange.