A&P Chapter 2 Flashcards
1
Q
Which of the following contains sodium:
A
D) NaCl.
2
Q
An atom with 11 protons, 12 neutrons, and 10 electrons is a(n): A) anion. B) cation. C) isotope. D) molecule. E) radioisotope.
A
B) cation.
3
Q
3. The movement of ions across cell membranes is an example of: A) radiant energy. B) potential energy. C) electrical energy. D) chemical energy. E) mechanical energy.
A
C) electrical energy.
4
Q
4. Which of the following is classified as an inorganic compound: A) water B) protein C) steroid. D) glucose. E) triglyceride.
A
A) water
5
Q
5. The most abundant element in the human body is: A) carbon. B) oxygen. C) calcium. D) nitrogen. E) hydrogen.
A
B) oxygen.
6
Q
6. Which of the following leads to an increase in the rate of a chemical reaction: A) few particles. B) lack of catalysts. C) large particle size. D) increased temperature. E) decreased temperature.
A
D) increased temperature.
7
Q
7. The atomic number is equivalent to the number of \_\_\_\_\_\_\_\_\_\_ in an atom. A) protons. B) neutrons. C) electrons. D) protons and neutrons. E) protons and electrons.
A
A) protons.
8
Q
8. The sum of the masses of all the protons and neutrons contained in the nucleus of an atom. A) electrons. B) atomic mass. C) radioisotopes. D) atomic weight. E) atomic number.
A
B) atomic mass.
9
Q
- The major function of potassium is to:
A) influence the pH of body fluids.
B) serve as a salt in bones and teeth.
C) make functional thyroid hormones.
D) exist as the most abundant extracellular fluid.
E) play a role in nerve impulse transmissions and muscle contractions.
A
play a role in nerve impulse transmissions and muscle contraction
10
Q
- Which of the following is the role of magnesium:
A) it is a major extracellular anion in its ionic form.
B) it is needed to make functional thyroid hormones.
C) it is present in bone and is an important cofactor for enzyme activity in a number of
metabolic reactions.
D) it is the major extracellular cation in its ionic form, and is important for water balance,
conduction of nerve impulses, and muscle contraction
E) it is a component of the functional haemoglobin molecule that
A
C) it is present in bone and is an important cofactor for enzyme activity in a number of
metabolic reactions.
11
Q
11. An atom with an atomic number of 14 will have \_\_\_\_\_\_\_\_\_\_ electrons in its valence shell. A) 2. B) 4. C) 8. D) 10. E) 14.
A
B) 4.
12
Q
- An atom with 6 protons, 7 neutrons, and 6 electrons shares four pairs of electrons with four
other atoms. This atom is now considered to be:
A) an ion
B) stable.
C) a cation
D) an anion
E) a neutral atom
A
B) stable.
13
Q
13. An atom has 6 protons, 8 neutrons, and 6 electrons. Its atomic mass is: A) 2. B) 6. C) 8. D) 14. E) 20.
A
D) 14
14
Q
14. The atomic number of an atom reveals the number of: A) protons plus neutrons B) protons plus electrons C) neutrons plus electrons. D) protons in the atomic nucleus E) electrons in the atomic nucleus.
A
D) protons in the atomic nucleus
15
Q
15. Isotopes have different numbers of \_\_\_\_\_\_\_\_\_\_; thus they also have different \_\_\_\_\_\_\_\_. A) protons; atomic masses. B) protons; atomic numbers. B) neutrons; atomic masses. C) neutrons; atomic numbers. E) electrons; atomic numbers.
A
B) neutrons; atomic masses.
16
Q
16. An atom that has lost two electrons is called a(n): A) anion. B) cation C) proton. D) isotope. E) radioisotope.
A
B) cation
17
Q
17. The subatomic particles that are responsible for the chemical behavior of atoms are the: A) ions. B) protons. C) isotopes. D) neutrons. E) electrons.
A
E) electrons.
18
Q
18. When a pair of electrons is shared equally between two atoms, the bond formed is called: A) ionic bond. B) carbon bond. C) hydrogen bond. D) polar covalent bond. E) nonpolar covalent bond.
A
E) nonpolar covalent bond.
19
Q
19. In the chemical reaction, HCl + NaOH →H2O + NaCl, the chemical NaOH is considered as: A) salt. B) acid. C) base. D) water. E) product.
A
base
20
Q
- In order to break a disaccharide down into simple sugar units:
A) carbon atom must be added to each bond.
B) water molecules must be added to each bond.
C) carbon atoms must be removed from each bond.
D) water molecules must be removed from each bond.
E) water molecules and carbon atoms must be removed from each bond.
A
B) water molecules must be added to each bond.