Question 28

The matrix of the hair contains cells that are actively reproducing.

The matrix is the area at the base of the hair follicle that contains rapidly dividing cells responsible for hair growth. These cells proliferate and contribute to the formation of the hair shaft.

A) Papilla

The papilla is a structure located at the base of the hair follicle that contains blood vessels and connective tissue, providing nutrients to the hair. However, it does not contain actively reproducing cells; instead, it supports the growth of the hair by nourishing the matrix.

B) Follicle

The follicle is a sheath-like structure that surrounds the hair root and plays a role in anchoring the hair. While the follicle supports hair growth, the actively reproducing cells are specifically found in the matrix rather than in the follicle itself.

C) Matrix

The matrix is indeed the part of the hair that contains actively reproducing cells. These cells are vital for the growth of hair as they divide and differentiate to form the hair shaft, thus making this option the correct answer.

D) Root

The root refers to the part of the hair that is embedded in the follicle and is not a specific area containing actively reproducing cells. While the root is essential for anchoring the hair, it is the matrix at the base of the follicle where cell division occurs.

Conclusion

The matrix is the definitive region where hair cells actively reproduce, enabling hair growth. Other options, such as the papilla, follicle, and root, play supporting roles but do not contain the actively dividing cells responsible for the formation of hair. Therefore, option C is clearly the correct answer.