The Science of Skin: Understanding Freckles and Moles

The video explores the hereditary nature of freckles, their formation due to melanin accumulation, and how they change with age and sun exposure. It also covers moles, their formation, and the importance of monitoring them for changes that could indicate skin cancer. The role of UV exposure in both freckles and moles is highlighted, along with the genetic factors involved.

What causes freckles to appear on the skin?

• Accumulation of melanin due to UV exposure

• Accumulation of eumelanin

• Presence of the MC1R gene without sun exposure

• Lack of sun exposure

Why are freckles not visible at birth?

• Melanocytes are not yet present

• Melanocytes have not been stimulated by UV

• Freckles only appear in adulthood

• Freckles are a result of skin damage

Which skin type is most likely to have freckles?

• Individuals with tanned skin

• Individuals with olive skin

• Individuals with red or fair skin

• Dark-skinned individuals

How do moles differ from freckles in terms of melanin concentration?

• Moles are clusters of melanocytes with high melanin concentration

• Freckles have more melanin concentration

• Freckles are clusters of melanocytes with high melanin concentration

• Moles have less melanin concentration

At what age do moles typically stop increasing in number?

• Around age 50

• Around age 35

• Around age 20

• Around age 10

Why is it important to monitor moles for changes?

• They might disappear completely

• They can cause skin irritation

• They might evolve into malignant tumors

• They can become more attractive

What technology is used to track changes in moles over time?

• X-ray imaging

• MRI scans

• Ultrasound

• Dermatoscope with mapping software