Test Your Hair Structure Knowledge! Trivia Quiz

The correct answer is Cuticle. The cuticle is the outermost layer of the hair shaft. It is a thin, transparent layer made up of overlapping cells that protect the inner layers of the hair from damage. The cuticle also helps to retain moisture and give the hair its smooth and shiny appearance.

Split ends occur when the ends of the hair shaft become frayed and damaged. This damage cannot be repaired, so the only effective way to get rid of split ends is to cut them off. Trimming the hair regularly helps to prevent split ends from occurring in the first place, but once they are present, cutting off the damaged ends is the only solution to maintain the health and appearance of the hair. Therefore, the statement "Split ends can only be treated by cutting off" is true.

The correct order of the layers starting from the outside is the cuticle, cortex, and medulla. The cuticle is the outermost layer of the hair shaft, providing protection and shine. The cortex is the middle layer, containing the pigment and giving the hair its strength and elasticity. The medulla is the innermost layer, consisting of soft keratin and providing structural support.

The cortex is the layer of the hair that contains hydrogen bonds. The cortex is the middle layer of the hair shaft and is responsible for the hair's strength, elasticity, and color. Hydrogen bonds are weak chemical bonds that form between the protein molecules in the cortex. These bonds contribute to the hair's structure and can be temporarily altered by heat or moisture, allowing for styling and shaping of the hair.

The medulla is the innermost layer of the hair shaft, and it is not present in all hair. The presence or absence of the medulla can vary depending on the type and location of the hair. Some hairs, particularly fine or light-colored ones, may lack a medulla entirely. Therefore, it is true that a medulla is not present in all hair.