Question

1. the hair cuticle is responsible for hairs strength, elasticity, and color. t f 15. the cortex is the fibrous protein layer of the hair and contributes to its weight. t f 16. the hair cuticle is the hairs outermost layer and is formed from cells shingles on a roof. t f 17. the cortex is also known as the hairs pith or core. t f 18. the hair cuticle protects the cortex. t f 19. in healthy hair, the cuticle lies flat, but during chemical services, it allows the chemicals to penetrate the cortex. t f 20. the hair shaft, also known as the hair strand or hair fiber, is the live part beyond the skin or scalp. t f

Explanation:

1. The hair cortex is responsible for hair's strength, elasticity, and color. The cuticle is the outermost protective layer. So this statement is False.
2. The cortex is the fibrous - protein layer of the hair and contributes to its strength, color, and texture, not just weight. But the general description is correct, so it's True.
3. The hair cuticle is the outermost layer of the hair and is formed from cells that overlap like shingles on a roof. This is True.
4. The medulla, not the cortex, is known as the hair's pith or core. So this is False.
5. The hair cuticle protects the cortex from damage. This is True.
6. In healthy hair, the cuticle lies flat. During chemical services, the cuticle is lifted to allow chemicals to penetrate the cortex. This is True.
7. The hair shaft, also known as the hair strand or hair fiber, is the visible part of the hair beyond the skin or scalp. This is True.

Answer:

1. F
2. T
3. T
4. F
5. T
6. T
7. T