fi fi fi fi fi fi L
atest UpdatedExamination Study Guide2022
fi fi fi fi fi
Understanding Pathophysiology 7th edition by Huether, McCance Test Bank fi fi fi fi fi fi f i fi
Chapter 1. Cellular Biology fi fi fi
MULTIPLE CHOICE fi
1. A student is observing a cell under the microscope. It is observed to have supercoiled DNA w
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ith histones. Which of the following would also be observed by the student?
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a. A single circular chromosome
fi fi fi
b. A nucleus fi
c. Free-floating nuclear material fi fi
d. No organelles fi
ANS: B fi
The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA within its nucleus
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; thus, the nucleus should be observed.
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A single circular chromosome is characteristic of prokaryotic cells, which do not have histones.
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Free-
floating nuclear material describes a prokaryotic cell, which would not have a distinct nucleus.
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Eukaryotic cells have membrane bounded cellular components called organelles. No organelles de
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scribes a prokaryotic cell. fi fi fi
2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurse d
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escribing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?
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a. Metabolic absorption fi
b. Communication
c. Secretion
d. Respiration
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atest UpdatedExamination Study Guide2022
fi fi fi fi fi
ANS: D fi
The ability of the cell to absorb oxygen refers to the cells function of respiration.
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The ability of the cell to function within a society of cells refers to its function of communication.
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The ability of the cell to take in nutrients refers to the cells function of metabolic absorption.
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The ability of the cell to synthesize new substances and secrete these elsewhere refers to the cells functi
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on of secretion.
fi fi
3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would most of th
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e genetic information be contained?
fi fi fi fi
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS: C fi
The region of the cell that contains genetic material, including a large amount of ribonucleic acid,
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most of the DNA, and DNA-binding proteins, is the nucleolus.
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The mitochondria is the site of cellular respiration.
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The ribosomes are involved in manufacturing of proteins within the cell.
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The nucleus contains the nucleolus, and it is the nucleolus that contains genetic material.
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4. The fluid mosaic model for biologic membranes describes membrane behavior. According to t
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his model, which of the following float singly or as aggregates in the fluid lipid bilayer?
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a. Peripheral membrane proteins fi fi
b. Integral membrane proteins fi fi
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atest UpdatedExamination Study Guide2022
fi fi fi fi fi
c. Glycoproteins
d. Cell adhesion molecules fi fi
ANS: B fi
Integral membrane proteins float freely in the fluid lipid bilayer.
fi fi fi fi fi fi fi fi fi
Peripheral membrane proteins are not embedded in the layer, but reside at the surface. Glycoprote
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ins act as cell surface markers.
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Cell adhesion molecules are on the outside of the membrane and allow cells to hook together.
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5. Which of the following can bind to plasma membrane receptors?
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a. Oxygen
b. Ribosomes
c. Amphipathic lipids fi
d. Ligands
ANS: D fi
Ligands are specific molecules that can bind with receptors on the cell membrane. Oxyge
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n moves by diffusion; it does not bind to receptors.
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Ribosomes make proteins and are not involved in binding.
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Amphipathic lipids are a portion of the cell membrane. fi fi fi fi fi fi fi fi
6. A nurse is reviewing a report from a patient with metastatic cancer. What finding would su
fi fi fi fi fi fi fi fi fi fi fi fi fi fi fi
pport the diagnosis of metastatic cancer? Alterations in extracellular matrix that include:
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a. Decreased fibronectin fi
b. Increased collagen fi
c. Decreased elastin fi
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atest UpdatedExamination Study Guide2022
fi fi fi fi fi
d. Increased glycoproteins fi
ANS: A fi
Reduced amounts of fibronectin are found in some types of cancerous cells, allowing cancer cells
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to travel, or metastasize.
fi fi fi
Collagen provides strength, and its breakdown is associated with osteoarthritis, not cancer.
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Elastin is found in the lungs and allows tissues to stretch; it is not associated with cancerous cells.
fi fi fi fi fi fi fi fi fi fi fi fi fi fi fi fi fi
Decreased, not increased, glycoproteins are associated with cancerous cells.
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7. Which form of cell communication is used to relate to other cells in direct physical contact?
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a. Cell junction fi
b. Gap junction fi
c. Desmosomes
d. Tight junctions fi
ANS: A fi
Cell junctions hold cells together and permit molecules to pass from cell to cell.
fi fi fi fi fi fi fi fi fi fi fi fi fi
Gap junctions allow communication from the inside of one cell to the inside of another. Desmoso
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mes are not involved in communication, but allow cells to hold together.
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Tight junctions are barriers that prevent movement of some substances and leakages of others.
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8. Pancreatic beta cells secrete insulin, which inhibits secretion of glucagon from neighboring al
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pha cells. This action is an example of which of the following signaling types?
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a. Paracrine
b. Autocrine
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