Question

question 1 (1 point)
which statement is true of the nail plate?
a it is more porous than normal skin of equal thickness.
b it is made of living cells.
c it is rigid and impermeable.
d it requires oxygen.

question 2 (1 point)
____ are keratin - filled cysts that are usually associated with newborns and are commonly found around the eyes, cheeks, and forehead.
a milia
b moles
c skin tags
d cicatrixes

question 3 (1 point)
what part of the hair is located below the surface of the epidermis?
a hair medulla
b hair shaft
c hair cuticle
d hair root

Explanation:

Question 1

• Option a: Nail plate is less porous than normal skin.
• Option b: Nail plate is made of dead, keratinized cells.
• Option c: Nail plate is rigid (due to keratin) and impermeable to water and many substances.
• Option d: Nail plate, being dead tissue, does not require oxygen.

• Option a: Milia are keratin - filled cysts common in newborns, found around eyes, cheeks, forehead.
• Option b: Moles are pigmented skin growths, not keratin - filled cysts.
• Option c: Skin tags are small, soft, benign growths, not keratin - filled cysts.
• Option d: Cicatrices are scars, not keratin - filled cysts.

• Option a: Hair medulla is the innermost part of the hair shaft (above epidermis in part).
• Option b: Hair shaft is the part of the hair above the epidermis.
• Option c: Hair cuticle is part of the hair shaft (above epidermis).
• Option d: Hair root is the part of the hair located below the surface of the epidermis, embedded in the hair follicle.

Answer:

c. It is rigid and impermeable.

Question 2