Test Bank For Understanding Pathophysiology 7th Edition/Questions And Answers/Exam Practice Guide/2024/A+/
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Understanding pathophysiology
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Understanding Pathophysiology
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Understanding Pathophysiology
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Understanding Pathophysiology 7th edition by
Huether, McCance Test Bank
Chapter 1. Cellular Biology
MULTIPLE CHOICE
• A student is observing a cell under the microscope. It is observed to have
supercoiled DNAwith 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
organellesdescribes a prokaryotic cell.
• A nurse is instructing the staff about cellular functions. Which cellular function is
the nursedescribing 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 cells function of respiration.
The ability of the cell to function within a society of cells refers to its
function ofcommunication.
The ability of the cell to take in nutrients refers to the cells function of metabolic absorption.
The ability of the cell to synthesize new substances and secrete these elsewhere refers to
the cells function of secretion.
• A eukaryotic cell is undergoing DNA replication. In which region of the cell would
most ofthe 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
ribonucleicacid, 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.
,• The fluid mosaic model for biologic membranes describes membrane behavior.
According tothis 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.
Cell adhesion molecules are on the outside of the membrane and allow cells to hook together.
A. Which of the following can bind to plasma membrane receptors?
B. Oxygen
C. Ribosomes
D. Amphipathic lipids
E. 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.
, • A nurse is reviewing a report from a patient with metastatic cancer. What
finding wouldsupport 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
cancercells 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
cancerouscells.
Decreased, not increased, glycoproteins are associated with cancerous cells.
• Which form of cell communication is used to relate to other cells in direct physical
contact?
A. Cell junction
B. Gap junction
C. Desmosomes
D. Tight junctions
ANS: A
Cell junctions hold cells together and permit molecules to pass from cell to cell.
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