Quiz 2 Flashcards
(48 cards)
a multistep procedure that involves a variety of stains and other chemicals that may interact with other compounds found in tissues to change the results.
HISTOLOGIC STAINS
Tissue components that stain with basic dyes are referred to as
Basophilic
Tissue components that stain with acid dyes are referred to as
Acidophilic
Acidic dyes have a net __________ and bind to components of cells and tissues that are ____________.
negative charge
positively charged
Basic dyes have a net ________ and bind to components of cells and tissues that are _________
positive charge
negatively charged
________ is a positively charged, ________ complex that stains basophilic structures.
Hematoxylin
blue dye
_______ is a negatively charged, ________ that stains acidophilic structures.
Eosin
pink dye
Staining pattern of Heterochromatin:
Tightly packed form of DNA.
Nuclei stain uniformly and intensely with hematoxylin.
Indicative of a cell with low transcriptional activity.
Staining pattern of Euchromatin
Lightly packed form of DNA.
Nuclei show random clumps of hematoxylin staining mostly at the periphery of the nucleus and the nucleolus.
indicative of cells with high transcriptional activity.
Is used to describe a group of cells that are similar in structure and perform a specific function.
Tissue
Collection of several types of tissues that structurally forms a working unit to perform a particular function.
Organ
Refers to the sheets of cells that cover the exterior surfaces of the body.
EPITHELIAL TISSUE
Binds the cells and organs of the body together and functions in the protection, support, and integration of all parts of the body.
CONNECTIVE TISSUES
Is excitable, responding to stimulation and contracting to provide movement.
MUSCLE TISSUE
Three major types of Muscle Tissue:
Skeletal muscle- voluntary
Smooth muscle
Cardiac muscle
Is excitable, allowing the propagation of electrochemical signals in the form of nerve impulses that communicate between different regions of the body.
NERVOUS TISSUE
Tissue: Epithelial
Cells:
Extracellular Matrix:
Main Functions:
Cells: Aggregated polyhedral cells
Extracellular Matrix: Small amount
Main Functions: Lining of surface or body cavities; glandular secretion
Tissue: Connective
Cells:
Extracellular Matrix:
Main Functions:
Cells: Several Types of fixed and wandering cells
Extracellular Matrix: Abundant amount
Main Functions: Support and protection of tissues/ organs
Tissue: Muscle
Cells:
Extracellular Matrix:
Main Functions:
Cells: Elongated contractile cells
Extracellular Matrix: Moderate amount
Main Functions: Strong contraction; body movements
Tissue: Nervous
Cells:
Extracellular Matrix:
Main Functions:
Cells: Elongated cells with extremely fine processes
Extracellular Matrix: Very small amount
Main Functions: Transmission of nerve impulses
Have the appearance of thin scales
Nuclei tend to be flat, horizontal, elliptical, mirroring the form of the cell
SIMPLE SQUAMOUS EPITHELIUM
The nucleus of the box-like cell appears round and is generally located near the center of the cell.
Are active in the secretion and absorption of molecules.
SIMPLE CUBOIDAL EPITHELIUM
The nucleus of the tall column-like cells tends to be elongated and located in the basal end of the cells.
SIMPLE COLUMNAR EPITHELIUM
Nuclei of neighboring cells appear at different levels rather than clustered in the basal end.
The arrangement gives the appearance of stratification. All cells are in contact with the basal lamina, although some do not reach the apical surface.
PSEUDOSTRATIFIED COLUMNAR EPITHELIUM
