Sodium ions and calcium ions are examples of
A) cations. B) uncharged particles.
C) salts. D) anions.
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Question 2) In an ionic bond
A) atoms share a pair or more of electrons.
B) oppositely charged atoms attract.
C) like-charged atoms repel.
D) each atom gains electrons.
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Question 3) In a covalent bond
A) oppositely charged atoms attract.
B) atoms share a pair or more of electrons.
C) like-charged atoms repel.
D) one atom loses and another atom gains electrons.
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Question 4) The atomic number of an atom equals the number of ______ and the atomic weight
equals the ____.
A) protons; number of protons plus neutrons
B) protons; weight of all the electrons
C) neutrons; number of protons plus electrons
D) neutrons; number of protons
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Question 5) Matter is composed of elements, which are composed of _____.
A) inorganic molecules B) organic molecules
C) chemicals D) atoms
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Question 6) Nutrients are delivered and waste products are carried away from the cells of the posterior segment of the eye by blood vessels. However, the cells in the cornea and lens (in the anterior segment) are avascular. Which is the best explanation for how these cells are maintained?
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Question 7) Inflammation ________.
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Question 8) An advantage of innate immunity is ________.
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Question 9) A vaccine is effective because ________.
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Question 10) All of the following are true of the classical pathway of complement activation except one. Select the one answer that does not describe the classical pathway of complement activation.
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