Most Insects Use External Sources of Heat to Achieve Their

question 2

Multiple Choice

Most insects use external sources of heat to achieve their operative temperature range. Heinrich's research on the sphinx moth (Manduca sexta) indicates that some insects can thermoregulate by using their flight muscles and

• A) using their blood as a coolant.
• B) decreasing their metabolic rate.
• C) possessing an internal respiratory system.
• D) using a countercurrent heat exchange mechanism.
• E) using a concurrent heat exchange mechanism.

---

Definitions:

Hardiness

Hardiness is a personality trait that encompasses control, commitment, and challenge, enabling people to handle stress better.

Resilience

The ability to recover from or adjust easily to misfortune or change, showcasing mental strength and perseverance.

Stress

A physical, mental, or emotional factor that causes bodily or mental tension and may be a factor in disease causation.

Adjustment

The process of adapting or becoming better suited to a particular situation or set of conditions.