Understanding Pathophysiology 7th Edition Test Bank by Sue E. Huether , Kathryn L. McCance

Understanding Pathophysiology 7th edition by Huether, McCance Test Bank
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All well solved complete (questions and answers) solution in this test bank
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,Chapter 1. Cellular Biology
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MULTIPLE CHOICE ty




1. Astudent is observinga cellunder the microscope. It is observed to have supercoiled DNA
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ty with histones. Which of the following would also be observed by the student?
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a. Asingle circular chromosome ty ty




b. A nucleus ty




c. Free-floatingnuclear material ty




d. No organelles ty




ANS: B ty




The cell described is a eukaryotic cell, so it has histones and a supercoiled DNAwithin its
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ty nucleus; thus, the nucleus should be observed.
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Asingle circular chromosome is characteristic ofprokaryotic cells, which do not have histones.
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Free-floating nuclear materialdescribes a prokaryotic cell, which would not have a distinct
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ty nucleus.

Eukaryotic cells have membrane bounded cellular components called organelles. No organelles
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ty describes a prokaryotic cell. ty ty ty




2. A nurse is instructing the staff about cellular functions. Which cellular function is the nurse
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ty describing when an isolated cell absorbs oxygen and uses it to transform nutrients to
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energy?
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a. Metabolic absorption ty




b. Communication
c. Secretion
d. Respiration

,ANS: D ty




The abilityof the cell to absorb oxygen refers to the cells function of respiration.
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The abilityof the cell to function within a societyofcells refers to its function of communication.
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The abilityof the cell to take in nutrients refers to the cells function of metabolic absorption.
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The abilityofthe cell to synthesize new substances and secrete these elsewhere refers to the cells
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ty function of secretion. ty ty




3. Aeukaryotic cell is undergoing DNA replication. In which region ofthe cellwould most of
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ty the genetic information be contained?
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a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS: C ty




The regionofthe cellthat contains genetic material, including a large amount of ribonucleic acid,
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ty most of the DNA, and DNA-binding proteins, is the nucleolus.
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The mitochondria is the site ofcellular respiration.
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The ribosomes are involved in manufacturing ofproteins within the cell.
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Thenucleus contains the nucleolus, and it is the nucleolus that contains genetic material.
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4. The fluid mosaic modelfor biologic membranes describes membrane behavior. According to
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ty this model, which of the following float singly or as aggregates in the fluid lipid
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ty bilayer?

a. Peripheralmembrane proteins ty




b. Integral membrane proteins ty ty

, c. Glycoproteins
d. Cell adhesion molecules
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ANS: B ty




Integralmembrane proteins float freely in the fluid lipid bilayer. ty ty ty ty mi ty ty ty




Peripheralmembrane proteins are not embedded in the layer, but reside at the surface.
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ty Glycoproteins act as cell surface markers. ty ty ty ty ty




Cell adhesion molecules are onthe outside ofthe membrane and allow cells to hooktogether.
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5. Whichofthe following can bind to plasma membrane receptors?
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a. Oxygen
b. Ribosomes
c. Amphipathic lipids ty




d. Ligands


ANS: D ty




Ligands arespecific molecules that can bind withreceptorsonthe cell membrane. Oxygen
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ty moves by diffusion; it does not bind to receptors.
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Ribosomes makeproteinsand arenot involved in binding.
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Amphipathic lipids are a portion of the cell membrane.
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6. Anurse is reviewing areport from a patient with metastatic cancer. What finding would
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ty support thediagnosis ofmetastatic cancer? Alterations in extracellular matrix that include:
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a. Decreased fibronectin ty




b. Increased collagen ty




c. Decreased elastin mi