*Question*
Q: Which type of substance is considered a proton donor in a reaction? Choices: - base - carbon - oxygen - acid A:
**Answer**
acid

*Question*
Q: Where are sensors for thermoregulation concentrated in the brain? Choices: - thyroid - pituitary gland - medulla - the hypothalamus A:
**Answer**
the hypothalamus

*Question*
Q: What part of the brain is largest in intelligent mammals? Choices: - thallus - manubrium - cortex - cerebrum A:
**Answer**
cerebrum

*Question*
Q: Which virus causes cold sores? Choices: - flu virus - microbes virus - stilts virus - herpes virus A:
**Answer**
herpes virus