Understanding Pathophysiology 8th edition by Huether, McCance Test Bank
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Understanding Pathophysiology 8th edition by Huet
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Understanding Pathophysiology 8th Edition By Huet
Understanding Pathophysiology 8th edition by
Huether, McCance Test Bank
Chapter 1. Cellular Biology
MULTIPLE CHOICE
1.
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 li...
Understanding Pathophysiology 8th edition by
Huether, McCance Test Bank
Chapter 1. Cellular Biology
MULTIPLE CHOICE
1. 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.
2. Which of the following 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.
3. 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.
4. 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.
Gap junctions allow communication from the inside of one cell to the inside of
another.Desmosomes are not involved in communication, but allow cells to hold
together.
Tight junctions are barriers that prevent movement of some substances and leakages of others.
, 5. Pancreatic beta cells secrete insulin, which inhibits secretion of glucagon from
neighboringalpha cells. This action is an example of which of the following signaling
types?
a. Paracrine
b. Autocrine
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