Why Do We Wrinkle When Wet?

The video explores why skin wrinkles when submerged in water, initially thought to be due to osmosis. However, it was discovered that the wrinkling is an active response of the nervous system, constricting blood vessels to cause the skin to pucker. This involuntary response may have an evolutionary function, providing better grip in wet conditions. A study showed that wrinkled fingers improved grip on wet objects by 12%. Despite this advantage, constant wrinkling is avoided as it reduces sensitivity.

What was the initial scientific explanation for why skin wrinkles in water?

• It was believed to be caused by osmosis.

• It was thought to be a result of skin drying out.

• It was considered a reaction to cold temperatures.

• It was attributed to the skin's natural elasticity.

What discovery did doctors make in 1935 regarding skin wrinkling?

• Wrinkling is caused by the skin's outer layer drying.

• Wrinkling does not occur in patients with nerve damage.

• Wrinkling is caused by exposure to sunlight.

• Wrinkling is a result of skin expanding.

How does the nervous system contribute to skin wrinkling?

• By expanding the skin surface area.

• By thickening the outer layer of skin.

• By constricting blood vessels below the skin.

• By increasing the skin's moisture content.

What evolutionary advantage might wrinkled skin provide?

• Faster healing of skin wounds.

• Increased skin sensitivity.

• Better protection against UV rays.

• Improved grip in wet conditions.

What did the 2013 study reveal about wrinkled fingers?

• They are more sensitive to temperature changes.

• They pick up wet objects faster than non-wrinkled fingers.

• They are less effective at handling dry objects.

• They are more prone to skin infections.