Final answer:
Hair is considered resistant when it is harder to raise its temperature and absorbs less moisture than normal hair.
Step-by-step explanation:
Hair is said to be resistant when it is harder than normal to raise its temperature. This means that it requires more heat or energy to increase the temperature of resistant hair compared to normal hair.
This resistance can be attributed to the structure and composition of the hair. Resistant hair has a tighter cuticle layer which makes it less porous and therefore less likely to absorb moisture. It is also more difficult for heat to penetrate resistant hair due to its denser structure.
For example, if you try to curl resistant hair with a curling iron, you may need to use a higher heat setting and hold the curling iron on the hair for a longer time compared to normal hair.
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