Physiology Practice Test - Lecture Exam 1 Module 2

1. What is the smallest stable unit of matter?
a. An atom
2. What is matter made up of only one kind of atom?
a. Element
3. What are atoms composed of?
a. Subatomic particles, protons, neutrons, electrons
4. What subatomic particles are inside the nucleus and which are outside?
a. protons/neutrons inside
b. Electrons outside
5. What is the atomic mass?
a. Weight of atom
6. What is the atomic number?
a. Number of protons in an atom
7. What is a molecule?
a. Two or more atoms that share electrons
8. What is a compound?
a. Substance with atoms of two or more elements
9. What is a free radical?
a. Atom or molecules with unpaired electrons in outermost shell and are very
reactive
10. What is an ionic bond?
a. For between oppositely charged ions (charged atoms).
11. What is a covalent bond?
a. Two atoms share electrons
12. What is a hydrogen bond?
a. Attractive of oppositely charged regions, polarity, weak
13. What is van der waals forces?
a. Weak attraction, nearby molecules due to transient charges, nonpolar
14. What special characteristic of hydrogen bonds affects water?
a. Allows for surface tension of water
15. What is the name for the starting substance in a chemical reaction?
a. Reactants
16. What is the name for the ending products in a chemical reaction?
a. Products
17. When does a chemical reaction happen?
a. When a new bond forms or old bonds break or both.
18. What is the most important inorganic compound?
a. Water
19. What is a solvent?
a. Dissolves solutes
20. What is the bodies main solvent?
a. Water
21. What are the thermal properties of water?
a. Has a high heat capacity, maintains heat