Health Ch. 13

Functions of the skin include

• protecting the body from pathogens.
• controlling internal body temperature.
• sensing pressure, pain, heat, and cold.
• all of the above.

What is one way to keep the skin healthy?

• washing with strong soap several times a day
• frequently touching the skin with the hands
• choosing nonirritating skin-care products
• avoiding foods that are rich in vitamin A

A skin problem that is caused by a virus is

• warts.
• eczema.
• ringworm.
• athlete’s foot.

What can help control the spread of head lice?

• following a well-balanced eating plan

• medical shampoo

• using curling irons or hot combs

• frequently wearing hats

Which statement about the nails is false?

• Nails are made of dead cells containing keratin.
• Nails protect and support the fingers and toes.
• Keeping toenails long reduces the risk of nail infections.
• Trimming toenails straight across helps prevent ingrown nails.

When plaque hardens, it forms a crust-like substance called tartar.

• true
• false

A tooth is naturally protected from bacteria by saliva.

• true
• false

A protective layer of plaque covers the crown of a tooth.

• true
• false

The neck is the visible portion of the tooth.

• true
• false

When sound waves enter the ear, they cause the eardrum to

• vibrate.
• stimulate receptor cells.
• send messages to the brain.
• interpret sounds.