Advanced Hair Quiz
Ready to start the quiz?
This quiz contains 10 questions. Click below to begin.
Q1. Which signaling pathway is essential for hair follicle morphogenesis?
- Hedgehog pathway
- mTOR pathway
- Notch pathway
- Wnt/β-catenin pathway
Q2. What is the role of dermal sheath cells during the hair cycle?
- Produce melanin
- Secrete sebum
- Form outer root sheath
- Provide support and aid regeneration
Q3. Which phase of the hair cycle is characterized by apoptosis and follicular regression?
- Catagen phase
- Exogen phase
- Anagen phase
- Telogen phase
Q4. Which transcription factor is necessary for hair shaft differentiation?
- FOXP3
- MYC
- LEF1
- TP53
Q5. What structural component gives hair its tensile strength?
- Disulfide bonds
- Melanin granules
- Elastin fibers
- Collagen helices
Q6. How do stem cells in the bulge region contribute to hair regeneration?
- They produce sebaceous gland cells
- They generate arrector pili muscle
- They activate and repopulate matrix cells
- They secrete melanin into cortex
Q7. Which enzyme converts testosterone to dihydrotestosterone (DHT) in hair follicles?
- Dehydrogenase
- Tyrosinase
- Aromatase
- 5-alpha-reductase type II
Q8. What causes miniaturization of hair follicles in androgenetic alopecia?
- Increased vitamin D levels
- Overproduction of sebum
- DHT shortens growth phase and shrinks follicles
- Autoimmune targeting of hair matrix
Q9. Which signaling molecule promotes hair growth by stimulating dermal papilla activity?
- Cortisol
- Tumor necrosis factor alpha
- Fibroblast growth factor 7 (FGF7)
- Interleukin-6 (IL-6)
Q10. What is the role of the inner root sheath in the hair follicle?
- Anchors hair to arrector pili
- Regulates blood supply to follicle
- Shapes and supports the growing hair shaft
- Synthesizes melanin
