17 Questions
During which phase of the hair growth cycle do hair follicles detach from the blood supply?
Catagen phase
What percentage of hair follicles are typically in the anagen phase?
90%
How long does the telogen phase of the hair growth cycle usually last?
3-6 months
Which phase of the hair growth cycle is characterized by no active hair growth?
Telogen phase
What is the significance of the exogen phase in the hair growth cycle?
Allows shedding of old hair
What percentage of hair strands are expected to be lost per day during the exogen phase?
50-100 strands
Which phase marks the transition between active hair growth and resting in the hair growth cycle?
Catagen phase
What determines how fast a person's hair grows during the anagen phase?
'Genetics and other factors
What is the estimated rate of hair growth per month during the anagen phase?
1.5 inches
Which phase of the hair growth cycle involves the detachment of hair follicles from the blood supply?
Catagen
What percentage of hair is typically in the exogen phase at any given time?
5%
During which phase of the hair growth cycle are old hairs pushed out by new hair growth?
Exogen
What happens to hair follicles during the catagen phase?
They shrink and slow in growth
In which phase of the hair growth cycle does no active hair growth occur?
Telogen
What would happen if there was no exogen phase in the hair growth cycle?
Hair strands would accumulate and lead to thinning
Which phase of the hair growth cycle marks the beginning of new hair cell production?
Anagen
How long does the shedding phase (exogen) of the hair growth cycle typically last?
2-5 months
Test your knowledge on the key components of the pilosebaceous unit, including hair, sebaceous gland, arrector pili muscle, and perifollicular connective tissue. Learn about their functions and structures in hair follicles.
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