Question

1. identify a true statement about the hair cuticle. a) it protects the cortex. b) it is the fibrous protein layer of the hair. c) it contributes to about 90 percent of the hair’s weight. d) it is part of the hair root. 7. which of the following is a function of the cortex? a) it contributes to 50 percent of the hair’s weight. b) it is responsible for the hair’s strength, elasticity, and color. c) it contains living cells that form the hair strand. d) it produces sebum that lubricates the hair and skin. 8. the ______ is the innermost layer found in coarse hair and beard hair and is also known as the hair’s pith or core. a) hair bulb c) medulla b) hair cuticle d) cortex 9. which of the following statements best describes keratinization? a) it is the process by which sebaceous glands enhance the production of keratin by melanocytes. b) it is the process by which the amount of keratin in the skin helps determine skin color. c) it is the process by which newly formed cells in the hair bulb mature, fill with keratin, move upward, lose their nucleus, and die. d) it is the process by which sebum, lipids, keratin, sweat, and water form a hydrolipidic film to protect the skin from drying out. 10. which of the following refers to tiny grains of pigment in the cortex that give natural color to the hair? a) collagen c) keratin b) elastin d) melanin chapter 07: hair and scalp properties

Explanation:

• Question 6: The hair cuticle is the out - most protective layer of the hair, safeguarding the cortex.
• Question 7: The cortex is responsible for the hair's strength, elasticity, and contains the pigment that determines color.
• Question 8: The medulla is the innermost layer of coarse hair and beard hair, also known as the hair's pith or core.
• Question 9: Keratinization is the process where newly formed cells in the hair bulb mature, fill with keratin, move upward, lose their nucleus, and die.
• Question 10: Melanin are the tiny grains of pigment in the cortex that give natural color to the hair.

Answer:

• 6. A. It protects the cortex.
• 7. B. It is responsible for the hair’s strength, elasticity, and color.
• 8. C. medulla
• 9. C. It is the process by which newly formed cells in the hair bulb mature, fill with keratin, move upward, lose their nucleus, and die.
• 10. D. melanin