Which property of the skin prevents harmful bacteria from colonising the epidermis and underlying dermis?Covering of DNA by melanin in keratinocytesSensation provided by receptors, warning our brain that bacteria are present on the surface of the skinDilation of blood vessels at the surface of the skin to release heat, destroying the bacteriaSecretion of low pH substances on the surface of the skin, which creates the acid mantle

Which of the following is not a function of the skin? defense against disease organisms synthesis of vitamin E regulation of body temperature excretion of water and salts

How is melanin protective?Multiple choice question.prevents loss of water from the skinfixes mutations in DNAprevents loss of heat from the skinabsorbs UV radiation from sunlight

Match features of the skin with the protection they provide.InstructionsDrag and drop application.Dendritic cellsDendritic cells drop zone empty.MelanocytesMelanocytes drop zone empty.SweatSweat drop zone empty.Keratinization and layering of cellsKeratinization and layering of cells drop zone empty.Physical barrierPathogen phagocytosisInhibition of microbial growthProtection from UV light

Describe FOUR ways the skin acts as a barrier to pathogens entering the body.

The substance called is produced in specialized skin cells. It absorbs ultraviolet radiation from sunlight, preventing it from causing mutations in the DNA of skin cells.