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Cell Histology Certification Review Exam Questions And Answers ( Verified Solutions)
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  • HISTOLOGY
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  • HISTOLOGY

Stains most often used in histology - correct answer hematoxylin and eosin hematoxylin-basic and stains acidic portions (nucleus rNA ) -eosin is acidic dye stains basic components of the cell -reddish orange Cytoplasm - correct answer ...

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  • August 8, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • cell histology

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  • HISTOLOGY
  • HISTOLOGY

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Cell Histology

Stains most often used in histology - correct answer hematoxylin and eosin

hematoxylin-basic and stains acidic portions (nucleus rNA )

-eosin is acidic dye stains basic components of the cell

-reddish orange



Cytoplasm - correct answer



Plasma membrane - correct answer lipid components: phospholipids and
cholesterol

phospholipid is amphipathic

-bilayer structure

-sometimes have sugar molecules that hang on the outside

-has a trilaminar apperance

-fuzzy membrane on the outer is the gylcocalyx

contains integral proteins and transmembrane proteins



Membrane proteins - correct answer have covalently attached oligosaccharide
chains exposed at the membrane surface

contribute to the cells glycocalyx- antigenic and functional properites

-serve as receptors

-transmembrane proteins often have multiple hydrophobic regions within the bilayer



Three types of endocytosis - correct answer phagocytosis, pinocytosis and



Phagocytosis - correct answer extension from the cell of large folds called
pseudopodia that engulf particles and internalize material into a vacuole or phagosome

, Pinocytosis - correct answer cell membrane invaginations and forms a pit
containing a drop of extracellular fluid and pinches off inside the cell, forms a pincytotic vesicle



Receptor mediated endocytosis - correct answer includes membrane proteins
called receptors that bind specific molecules (ligands) when enough are bound by their ligand they
aggregate in a region that invaginate and creates a endosome containing the receptor and the bound
ligands



Ribosomes - correct answer tranlate mRNA

-free polyribosomes

ribosomes associated with the ER



RER - correct answer ribosomes associated with the membrane,

coninutity between the RER and SER

RER is the site for synthesis of most membrane-bound proteins,

The interconnected membranous cisternae of RER are flattened, while those of SER are frequently
tubular.



SER - correct answer three diverse activities are associated with smooth ER:
(1) lipid biosynthesis, (2) detoxification of potentially harmful compounds, and (3) sequestration of Ca++
ions. Specific cell types with well-developed SER are usually specialized for one of these functions.



Protein localization and cell morphology - correct answer o The ultrastructure
and general histologic appearance of a cell are determined by the nature of the most prominent
proteins the cell is making.



Cells that make few or no protein - correct answer for secretion have very
little RER, with essentially all polyribosomes free in the cytoplasm.

ERYTHROCYTES



Cells that synthesize, segregate and store various proteins in specific secretory vesicles - correct answer
always have RER, a Golgi apparatus, and a supply of granules containing the proteins ready to be
secreted.

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