Question

question 25 (1 point)
which type of hair has the largest diameter and usually requires more processing?
o a coarse hair
b gray hair
o c medium hair
d terminal hair

question 26 (1 point)
which of the following can be a cause of dry hair and dry scalp?
o a absence of melanin
b overactive sebaceous glands
o c hair follicles growing out of the head at a perpendicular angle
d inactive sebaceous glands

question 27 (1 point)
all of the following are living portions of hair that are below the skin surface except
o a the hair follicle
b the dermal papilla
o c the hair bulb
d the arrector pili muscle

Explanation:

Question 25

Coarse hair has a larger diameter than other types like medium or terminal (which is a general type including different textures). Gray hair is more about pigment loss. Coarse hair's structure often needs more chemical or styling processing.

Sebaceous glands produce sebum (oil). Inactive ones don't produce enough oil, leading to dry hair and scalp. Absence of melanin affects hair color. Overactive glands would cause oily hair. Hair follicle angle doesn't directly relate to dryness.

The hair bulb, follicle, and dermal papilla (which has blood vessels for nourishment) are living parts below the skin. The arrector pili muscle is a muscle attached to the follicle but is not part of the 'living portion of the hair' itself (the hair shaft above is dead, and the arrector pili is a separate muscle structure).

Answer:

A. coarse hair

Question 26