American Academy of Professional Coders (AAPC) Practice Exam

Approximately how much does hair on the scalp grow per day?

1. 0.1 to 0.2 mm/day

2. 0.3 to 0.4 mm/day

3. 1.0 mm/day

4. 1.5 mm/day

The correct answer is: 0.3 to 0.4 mm/day

The typical growth rate of hair on the scalp is approximately 0.3 to 0.4 mm per day. This growth rate can vary between individuals due to factors such as genetics, nutrition, and overall health. The answer indicating this range aligns with established scientific understanding of hair growth. Hair growth involves a complex biological process where hair follicles cycle through phases of growth, rest, and shedding. Understanding the average rate helps professionals assess hair health and diagnose potential issues with hair loss or scalp conditions. Providing insight into the biological processes affects various fields, including dermatology and cosmetic practices. Therefore, the chosen answer reflects the most accurate growth range for hair on the scalp compared to everyday observations and studies on hair physiology.