Which statement is correct?
A) Using expensive hair products can enhance the mitotic growth of hair cells within the shaft.
B) A hair shaft is made of varying densities and consistencies of keratin.
C) All hairs have the same growth cycle until mid-life.
D) Carotene is the major pigment that colors hair shafts.
E) Any hair loss signifies a medical condition, which should be checked by a doctor.

Question

Quizplus · Accepted Answer

A hair shaft is made of different types and densities of keratin, such as hard and compacted keratin in the outer layers and softer keratin in the inner layers. Choice A is false as expensive hair products may contain ingredients that can improve the appearance or health of hair but cannot directly affect mitotic growth of hair cells. Choice C is false as hair growth cycles can vary depending on factors such as genetics, age, and health status. Choice D is false as melanin is the major pigment that colors hair. Choice E is false as some degree of hair loss is normal and can be attributed to natural shedding or aging.

Which Statement Is Correct