Anatomy of Pilosebaceous Unit Quiz
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Questions and Answers

During which phase of the hair growth cycle do hair follicles detach from the blood supply?

  • Anagen phase
  • Exogen phase
  • Telogen phase
  • Catagen phase (correct)

    • What percentage of hair follicles are typically in the anagen phase?

  • 90% (correct)
  • 10%
  • 50%
  • 30%

    • How long does the telogen phase of the hair growth cycle usually last?

  • 1-2 weeks
  • 3-6 months (correct)
  • 2-3 months
  • 6-9 months

    • Which phase of the hair growth cycle is characterized by no active hair growth?

    <p>Telogen phase</p> Signup and view all the answers

    What is the significance of the exogen phase in the hair growth cycle?

    <p>Allows shedding of old hair</p> Signup and view all the answers

    What percentage of hair strands are expected to be lost per day during the exogen phase?

    <p>50-100 strands</p> Signup and view all the answers

    Which phase marks the transition between active hair growth and resting in the hair growth cycle?

    <p>Catagen phase</p> Signup and view all the answers

    What determines how fast a person's hair grows during the anagen phase?

    <p>'Genetics and other factors</p> Signup and view all the answers

    What is the estimated rate of hair growth per month during the anagen phase?

    <p>1.5 inches</p> Signup and view all the answers

    Which phase of the hair growth cycle involves the detachment of hair follicles from the blood supply?

    <p>Catagen</p> Signup and view all the answers

    What percentage of hair is typically in the exogen phase at any given time?

    <p>5%</p> Signup and view all the answers

    During which phase of the hair growth cycle are old hairs pushed out by new hair growth?

    <p>Exogen</p> Signup and view all the answers

    What happens to hair follicles during the catagen phase?

    <p>They shrink and slow in growth</p> Signup and view all the answers

    In which phase of the hair growth cycle does no active hair growth occur?

    <p>Telogen</p> Signup and view all the answers

    What would happen if there was no exogen phase in the hair growth cycle?

    <p><strong>Hair strands would accumulate and lead to thinning</strong></p> Signup and view all the answers

    Which phase of the hair growth cycle marks the beginning of new hair cell production?

    <p><strong>Anagen</strong></p> Signup and view all the answers

    How long does the shedding phase (exogen) of the hair growth cycle typically last?

    <p><strong>2-5 months</strong></p> Signup and view all the answers

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