The Average Threshold for Human Hearing Is the Tick of a Watch

question 237

Multiple Choice

The average threshold for human hearing is the tick of a watch from __________ under very quiet conditions.

• A) 20 feet
• B) 60 feet
• C) 40 feet
• D) 80 feet

---

Definitions:

Lumbar Plexus

A network of nerve fibers in the lower back (lumbar region) that supplies nerves to the lower limb.

Major Nerve

A principal nerve, typically large in size, that carries significant sensory or motor information to and from the central nervous system.

Brachial Plexus

A network of nerves that originate from the spinal cord in the neck and supply the arm and hand.

Phrenic

Relating to the diaphragm, especially a nerve that originates in the neck and passes down between the lung and heart to reach the diaphragm.