*Question*
Q: Some hormones produced by the anterior pituitary regulate the production of hormones by other tissues belonging to what system? Choices: - nervous - digestive - cardiovascular - endocrine A:
**Answer**
endocrine

*Question*
Q: Breaking of weak bonds, which tend to form between positive and negative charges, does not require much what? Choices: - catalyzation - heat - time - energy A:
**Answer**
energy

*Question*
Q: What is formed when an oxygen atom picks up a pair of hydrogen ions from a solution? Choices: - liquid - turpentine - ammonia - water A:
**Answer**
water

*Question*
Q: Most oxygen in blood is bound to a protein called what, and carried to the tissues? Choices: - platelete - hydrogen - plasma - hemoglobin A:
**Answer**
hemoglobin