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Exam (elaborations) TEST BANK UNDERSTANDING PATHOPHYSIOLOGY, 5TH EDITION HUETHER AND MCCANCE

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Harvard University

TEST BANK UNDERSTANDING PATHOPHYSIOLOGY, 5TH EDITION HUETHER AND MCCANCE Chapter 01: Cellular Biology Huether and McCance: Understanding Pathophysiology, 5th Edition Chapter 01: Cellular Biology Test Bank MULTIPLE CHOICE 1. A student is observing a cell under the microscope. It is observed ...

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test bank understanding pathophysiology
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Chapter 01: Cellular Biology
Huether and McCance: Understanding Pathophysiology,
5th Edition
Chapter 01: Cellular Biology
Test Bank
MULTIPLE CHOICE
1. A student is observing a cell under the microscope. It is observed to have
supercoiled DNA with histones. Which of the following would also be observed by
the student?
a. A single circular chromosome
b. A nucleus
c. Free-floating nuclear material
d. No organelles
ANS: B
The cell described is a eukaryotic cell, so it has histones and a supercoiled DNA
within its nucleus; thus, the nucleus should be observed.
A single circular chromosome is characteristic of prokaryotic cells, which do not have
histones.
Free-floating nuclear material describes a prokaryotic cell, which would not have a
distinct nucleus.
Eukaryotic cells have membrane bounded cellular components called organelles. No
organelles describes a prokaryotic cell.
REF: p. 2
2. A nurse is instructing the staff about cellular functions. Which cellular function is
the nurse describing when an isolated cell absorbs oxygen and uses it to transform
nutrients to energy?
a. Metabolic absorption
b. Communication
c. Secretion
d. Respiration
ANS: D
The ability of the cell to absorb oxygen refers to the cell’s 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.
The ability of the cell to take in nutrients refers to the cell’s function of metabolic
absorption.
The ability of the cell to synthesize new substances and secrete these elsewhere refers
to the cell’s function of secretion.
REF: p. 3
3. A eukaryotic cell is undergoing DNA replication. In which region of the cell would
most of the genetic information be contained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS: C
The region of the cell that contains genetic material, including a large amount of
ribonucleic acid, most of the DNA, and DNA -binding proteins, is the nucleolus.
The mitochondria is the site of cellular respiration.
The ribosomes are involved in manufacturing of proteins within the cell.
The nucleus contains the nucleolus, and it is the nucleolus that contains genetic
material.
REF: p. 5
4. The fluid mosaic model for biologic membranes describes membrane behavior.
According to this model, which of the following float singly or as aggregates in the
fluid lipid bilayer?
a. Peripheral membrane proteins
b. Integral membrane proteins
c. Glycoproteins
d. Cell adhesion molecules
ANS: B
Integral membrane proteins float freely in the fluid lipid bilayer.
Peripheral membrane proteins are not embedded in the layer, but reside at the surface.
Glycoproteins 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.
REF: p. 6
5. Which of the follow ing can bind to plasma membrane receptors?
a. Oxygen
b. Ribosomes
c. Amphipathic lipids
d. Ligands
ANS: D
Ligands are specific molecules that can bind with receptors on the cell membrane.
Oxygen moves by diffusion; it does not bind to receptors.
Ribosomes make proteins and are not involved in binding.
Amphipathic lipids are a portion of the cell membrane.
REF: p. 11
6. A nurse is reviewing a report from a patient with metastatic cancer. What finding
would support the diagnosis of metastatic cancer ? Alterations in extracellular matrix
that include:
a. Decreased fibronectin
b. Increased collagen
c. Decreased elastin
d. Increased glycoproteins
ANS: A
Reduced amounts of fibronectin are found in some types of cancerous cells, allowing
cancer cells to travel, or metastasize.
Collagen provides strength, and its breakdown is associated with osteoarthritis, not
cancer.
Elastin is found in the lungs and allows tissues to stretch; it is not associated with
cancerous cells.
Decreased, not increased, glycop roteins are associated with cancerous cells.
REF: p. 8
7. Which form of cell communication is used to relate to other cells in direct physical
contact? Powered by TCPDF (www.tcpdf.org)
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