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