Question: Which of the following is a substance that, when added to a chemical solution, prevents large changes in the pH of the solution?
Answer Choices:
a. binder, b. buffer, c. effector, d. transmitter.
Answer: b. buffer.
Question: An ionic bond will form when two ions have what relationship to each other?
Answer Choices:
a. one neutral atom, one positively charged, b. electrically neutral, c. oppositely charged, d. similarly charged.
Answer: c. oppositely charged.
Question: The release of histamines in the integumentary system causes which of the following?
Answer Choices:
a. intestinal bleeding, b. migraine headaches, c. blood in stool, d. skin redness and swelling.
Answer: d. skin redness and swelling.
Question: As humans age, what causes wrinkles?
Answer Choices:
a. Elastic fibers and adipose tissue decrease, b. collagen fibers decrease in number, c. faster division of skin cells, d. increased flexibility and elasticity of connective tissues.
Answer: b. collagen fibers decrease in number.
Question: Which statement is true of homeostatic mechanisms?
Answer Choices:
a. They help keep the body’s internal environment consistent, b. They occur only when a body is in optimal condition, c. They are generally a result of severe malnourishment, d. They are most likely to occur in people who are comatose.
Answer: a. They help keep the body’s internal environment consistent.
Question: Inorganic chemistry generally deals with substances that do not contain
Answer Choices:
a. carbon, b. glucose, c. oxygen, d. sodium.
Answer: a. carbon.
Question: Which type of chemical bond features an unequal sharing of electrons between two atoms, which results in a slight positive charge on one side and a slight negative charge on the other side?
Answer Choices:
a. hydrogen, b. ionic, c. nonpolar covalent, d. polar covalent.
Answer: d. polar covalent.
Question: The cranial nerve that’s parasympathetic distribution is to the thorax and abdomen is the
Answer Choices:
a. facial (VII) nerve, b. glossopharyngeal (IX) nerve, c. oculomotor (III) nerve, d. vagus (X) nerve.
Answer: d. vagus (X) nerve.
Question: Which of the following structural features of the plasma membrane is a result of more positively charged ions on the outside and more negatively charged ions on the inside?
Answer Choices:
a. fluid nature, b. membrane potential, c. polar head group with a nonpolar tail, d. stabilization by cholesterol molecules.
Answer: b. membrane potential.
Question: What organelle is responsible for protein and lipid modification, packaging, and distribution throughout the cell?
Answer Choices:
a. Golgi apparatus, b. lysosome, c. mitochondrion, d. proteasome.
Answer: a. Golgi apparatus.
Question: The four characteristic functions of a cell are metabolism, synthesis, communication, and which of the following?
Answer Choices:
a. anaerobic respiration, b. hydration, c. osmosis, d. reproduction.
Answer: d. reproduction.
Question: What organelle is continuous with an animal cell’s outer nuclear membrane?
Answer Choices:
a. endoplasmic reticulum, b. Golgi apparatus, c. lysosome, d. ribosome.
Answer: a. endoplasmic reticulum.
Question: In the “ABCDE” rule of detecting melanoma, what symptom is represented by the “E”?
Answer Choices:
a. epidermis, b. evolving, c. excess, d. exposure.
Answer: b. evolving.
Question: When adenosine diphosphate (ADP) gains an inorganic phosphate group, it becomes
Answer Choices:
a. ATP, b. AMP, c. RNA, d. TEM.
Answer: a. ATP.
Question: Which of the following provides energy for cellular respiration?
Answer Choices:
a. PKU, b. ATP, c. DNA, d. RNA.
Answer: b. ATP.