According to the U

question 35

Multiple Choice

According to the U. S. Department of Commerce, which of the following rules must be followed by makers of toy guns?

• A) Darts from toy guns must be made of materials that will not penetrate skin.
• B) Toy guns cannot contain parts made of lead or lead-based paint.
• C) Reflective paint must be used on toy guns.
• D) Toy guns must be distinguishable from real guns.

---

Definitions:

Parabronchi Capillaries

Microscopic blood vessels found in the lungs of birds that facilitate gas exchange, part of a unique respiratory system structure involving parabronchi.

Gas Exchange

Gas exchange is the biological process through which organisms exchange oxygen and carbon dioxide with their environment, critical for respiration.

Parabronchi

Tubular structures in the respiratory system of birds that allow air to flow through the lungs in one direction, facilitating efficient gas exchange.

Tidal Volume

The amount of air that is inhaled or exhaled from the lungs during normal breathing.