Question

question 19 (1 point)
a small, cone - shaped area located at the base of the hair follicle that fits into the hair bulb is the ____
○ a dermal cuticle
○ b dermal papilla
○ c hair follicle
○ d hair strand

question 20 (1 point)
the dead, colorless tissue attached to the natural nail plate is the ____.
○ a ligament
○ b cuticle
○ c eponychium
○ d lunula

question 21 (1 point)
the substance secreted by the sebaceous glands is called ____.
○ a sulfur
○ b sudoriferous
○ c sebum
○ d lymph

Explanation:

Question 19

To solve this, we recall the structure of hair follicles. The dermal papilla is a cone - shaped area at the base of the hair follicle that fits into the hair bulb. The dermal cuticle is not the correct structure here, the hair follicle is the structure that contains the hair bulb and dermal papilla, and the hair strand is the visible part of the hair.

We need to know the structures of the nail. The eponychium is the dead, colorless tissue attached to the natural nail plate. Ligaments are connective tissues for bones, the cuticle (in nail terms, the eponychium is also called the cuticle in some contexts but the option 'eponychium' is more specific here), and the lunula is the white half - moon - shaped area at the base of the nail.

Sebaceous glands secrete sebum. Sulfur is a chemical element, sudoriferous glands secrete sweat, and lymph is a fluid in the lymphatic system.

Answer:

b. dermal papilla

Question 20