The Most Energy- Efficient Form of Transportation in the Animal

question 59

Multiple Choice

The most energy- efficient form of transportation in the animal kingdom is a human on a bicycle. A basic physics principle that helps explain the bicycle's high efficiency [relative to other technologies for human transportation] is

• A) the second law of thermodynamics.
• B) the work- energy principle.
• C) the law of gravity.
• D) the electromagnetic force law.
• E) the law of conservation of energy.

---

Definitions:

Endorphins

Natural, pain-relieving chemicals produced by the body that are released in response to stress, pain, or exercise, promoting feelings of pleasure or well-being.

Vestibular Sense

The sense that provides information about the body’s orientation in space.

Kinesthetic Sense

The sense providing information about the position and movement of body parts.

Gate-Control Theory

A theory proposing that the spinal cord contains a neurological "gate" that either blocks pain signals or allows them to continue on to the brain.