How many sweat glands are in an inch of skin?
a. 20
b. 350
c. 650
d. 1,000
b. 350
c. 650
d. 1,000
Answer
c. There are about 650 sweat glands per square inch. That's more than two million sweat glands covering your body! These are vital to regulating your body temperature. On average, people produce about a liter of sweat each day.
Which isn't one of the three main layers of skin?
a. Dermis
b. Reladermis
c. Epidermis
d. Subcutaneous
b. Reladermis
c. Epidermis
d. Subcutaneous
Answer
b. The reladermis is not a layer of skin. The epidermis is your outer layer of skin, and is composed of five sheets of skin. Below this is the dermis, which contains hair follicles and sweat glands. The deepest layer is the subcutaneous (also called the hypodermis), a layer of fat and blood vessels.
How often does your body replace your skin cells?
a. Every 3 hours
b. Every 3 days
c. Every 3 weeks
d. Every 3 months
b. Every 3 days
c. Every 3 weeks
d. Every 3 months
Answer
c. Every skin cell in your body is replaced within three weeks. So every 21 days, you're walking around in a whole new "birthday suit."
What substance gives your skin color?
a. Melanin
b. Melatonin
c. Melon
d. Medulla
b. Melatonin
c. Melon
d. Medulla
Answer
a. Melanin is a pigment produced in the epidermis to protect us from the sun's ultraviolet rays. Melanin can also be found in your hair and your irises.
What vitamin does your skin produce?
a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin D
b. Vitamin B
c. Vitamin C
d. Vitamin D
Answer
d. Our skin produces vitamin D, which helps your body use calcium to form and maintain strong bones. Without vitamin D, your bones may become thin, soft, and brittle. Your skin produces vitamin D in reaction to exposure to the ultraviolet radiation in sunlight.
Acne is caused by eating chocolate and greasy food.
a. True
b. False
b. False
Answer
b. False. Acne is caused by an obstruction of your pores, and overproduction of oil. The amount of oil your body produces is regulated by hormones. So while chocolate and greasy food may not be healthy, they don't affect the hormones that regulate oil production.
How often should you apply sunscreen if you're going to be outside on a sunny day?
a. Every hour
b. Every two hours
c. Once in the morning, and once at noon
d. It depends on if you want a tan
b. Every two hours
c. Once in the morning, and once at noon
d. It depends on if you want a tan
Answer
b. The American Academy of Dermatology recommends applying sunscreen every two hours, whether or not you go swimming. You should use a sunscreen with an SPF rating of 15 or higher. Remember to apply sunscreen 15 to 20 minutes before heading into the sun.
