What object is safe to put in your ear? (a) A cotton-tipped swab, (b) A pair of tweezers, (c) A small brush, (d) None of the above.

Which parts of the ear are involved in balance? (a) Semicircular canals and vestibule, (b) Round window and eustachian tube, (c) Oval window and incus, (d) Temporal bone and cochlea.

If $M , N$ are such that $x ^ { - 1 } M x = M$ and $x ^ { - 1 } N x = N$ for all $x \in G ,$ and if $M \cap N = ( e ) ,$ prove that $m n = n m$ for any $m \in M , n \in N$

When you blink, tears move across the surface of the eyeball to: (a) moisten and clean the eye. (b) reduce glare from sunlight. (c) give the eye time to adjust to images. (d) prevent eyestrain.

What is malocclusion? (a) Bad breath. (b) A crust that forms from unremoved plaque. (c) A source of acids on teeth. (d) A misalignment of teeth.

What refines the focus of an image onto the retina? (a) The lens, (b) The sclera, (c) The cornea, (d) The choroid.

Which of the following is a risk from overexposure to UV radiation? (a) Hepatitis B. (b) Hepatitis C. (c) Skin cancer. (d) HIV.

What component of plaque works on sugars to create acids that cause cavities? (a) Viruses. (b) Bacteria. (c) Moles. (d) Boils.

What is the difference between a series circuit and a parallel circuit?

Which medical condition may require people to limit their salt intake? (a) Allergies, (b) Diabetes, (c) High cholesterol, (d) High blood pressure.

What are two functions of the teeth?

What part of the tooth is the connective layer between the enamel and the pulp? (a) Dentin. (b) Root canal. (c) Periodontal ligaments. (d) Gum.

What is the order of the structure of the skin, going from the inner body to the outer body? (a) Epidermis, dermis, subcutaneous layer. (b) Subcutaneous layer, dermis, epidermis. (c) Dermis, subcutaneous layer, epidermis. (d) Subcutaneous layer, epidermis, dermis.

How can you prevent muscle strains when you are participating in a new physical activity?