Skincare Skincare MCQ 4 — Questions and Answers
Question 1: Which type of sunscreen physically blocks UV rays by sitting on top of the skin?
- Chemical sunscreen
- Mineral sunscreen (Correct answer)
- Organic sunscreen
- Hybrid sunscreen
Correct answer: Mineral sunscreen
Mineral sunscreens contain zinc oxide or titanium dioxide and physically reflect and scatter UV rays from the skin's surface.
Question 2: What is the recommended minimum SPF for daily facial sunscreen according to most dermatologists?
- SPF 10
- SPF 15
- SPF 30 (Correct answer)
- SPF 75
Correct answer: SPF 30
Dermatologists generally recommend a minimum SPF 30 for daily use, which blocks about 97% of UVB rays.
Question 3: Which skin concern refers to dark spots left behind after acne or inflammation heals?
- Hyperpigmentation (PIH) (Correct answer)
- Melasma
- Vitiligo
- Sebaceous hyperplasia
Correct answer: Hyperpigmentation (PIH)
Post-inflammatory hyperpigmentation (PIH) occurs when excess melanin is produced in response to inflammation, leaving dark spots after acne heals.
Question 4: Which active ingredient is known for inhibiting tyrosinase and is commonly used to treat hyperpigmentation?
- Ceramide
- Hyaluronic acid
- Kojic acid (Correct answer)
- Peptides
Correct answer: Kojic acid
Kojic acid inhibits the enzyme tyrosinase, which is essential for melanin production, making it effective for treating dark spots.
Question 5: What does 'occlusive' mean when referring to moisturizer ingredients?
- They attract water to the skin
- They form a barrier to prevent moisture loss (Correct answer)
- They exfoliate dead skin cells
- They stimulate collagen production
Correct answer: They form a barrier to prevent moisture loss
Occlusive ingredients like petrolatum and beeswax create a physical barrier on skin's surface that prevents water from evaporating.
Question 6: Which skin condition involves the immune system attacking the skin, causing itchy, inflamed patches often triggered by allergens?
- Rosacea
- Atopic dermatitis (eczema) (Correct answer)
- Acne vulgaris
- Seborrheic keratosis
Correct answer: Atopic dermatitis (eczema)
Atopic dermatitis (eczema) is an inflammatory skin condition involving immune dysfunction that causes itchy, red, and inflamed skin patches.
Question 7: What is the purpose of ceramides in skincare products?
- To exfoliate the skin surface
- To provide broad-spectrum UV protection
- To restore and strengthen the skin's natural barrier (Correct answer)
- To stimulate collagen synthesis
Correct answer: To restore and strengthen the skin's natural barrier
Ceramides are lipids naturally found in the skin barrier, and using them in skincare helps restore and reinforce the skin's protective function.
Skincare Skincare MCQ 4
Which type of sunscreen physically blocks UV rays by sitting on top of the skin?