Question: Q: What in the skin dilates, or widens, in order to increase blood flow to the bodys surface? Choices: - veins - pores - tear ducts - blood vessels A:
Answer: blood vessels

Question: Q: What are groups of atoms that behave as a single unit called? Choices: - protons - particles - ions - molecules A:
Answer: molecules

Question: Q: What does a keratometer measure in the cornea? Choices: - diameter - Lenght - Width - curve A:
Answer:
curve