histology pt 1 quiz 1 Flashcards
____ a group of similar cells that function together
tissue: a group of similar cells that function together
______ is the study of tissues
histology: the study of tissues
list the 4 types of tissues
epithelial tissue, connective tissue, muscle tissue, nervous tissue
_________ are the embryonic tissues from which all tissues and organs of the body develop
Primary germ layers are the embryonic tissues from which all tissues and organs of the body develop
the fertilized egg or _______undergoes multiple rounds of mitosis
the fertilized egg or zygote undergoes multiple rounds of mitosis
zygote undergoes multiple rounds of mitosis
this forms a multicellular _______
blastocyst
_______- outer germ layer
ectoderm - outer germ layer
_______ middle germ layer
mesoderm - middle germ layer
_______ - inner germ layer
endoderm - inner germ layer
name the 5 types of cell junctions
tight junctions, adherens junctions, desmosomes, hemidesmosomes, gap junction
adherens junctions
composed of _____, a dense layer of proteins inside the plasma membrane attached to microfilaments
plaque
_____ form seals between cells to prevent leakage of fluid between them
tight junctions
_____ composed of plaque, a dense layer of proteins inside the plasma membrane attached to microfilaments
adherens junctions
______ composed of plaque and transmembrane proteins linking adjacent cells
desmosomes
______ connects a cell to extracellular material such as basement membranes
hemidesmosomes
_________ communicating junctions that permit electrical or chemical signals to pass from cell to cell
gap junctions
in gap junctions transmembrane proteins called ______ form fluid-filled channels
connexons
name the two major types of tissues
covering and lining, glandular
firmly adheres to underlying connective tissue called
the________
firmly adheres to underlying connective tissue called
the basement membrane
how many days to replace all skin cells
28 days
____ are flattened, scale-like cells
squamous
____ are cube shaped
cuboidal
_____ are tall and cylindrical; rectangular
columnar
____ cells are able to change shape and stretch
transitional
the lining of blood vessels and the heart is called ______
endothelium
forms part of serous membranes, _______, where it secretes serous fluid
mesothelium
cell staining compounds ***
hematoxylin (purple), eosin (pink)
3 types of epithelial tissues
simple, stratified, pseudostratified
Non-Ciliated Simple Columnar Epithelium may contain _______(increase surface area for absorption) and ______ which secrete mucus for lubrication and protection
microvilli, goblet cells
Ciliated Simple Columnar Epithelium are found primarily in ____ and ____
respiratory tract, fallopian tubes
Non-Ciliated Simple Columnar Epithelium are found in ______ and _____
gastrointestinal tract, ducts of glands
stratified squamous epithelium found in what 3 things
mouth, vagina, outer layer of the skin
transitional epithelium is found in the _____-
bladder
Pseudostratified Columnar Epithelium form the _____
trachea
**pseudostratified ciliated columnar epithelial found in _____
found in upper respiratory tract, fallopian tubes
pseudostratified nonciliated columnar epithelial lines ____
larger ducts and glands
a______ is a highly specialized epithelial cell or group of cells that secretes substances into duct or surface, or into the blood
a gland is a highly specialized epithelial cell or group of cells that secretes substances into duct or surface, or into the blood
_________
secrete substance into _____ then (usually) into the blood
endocrine glands, into the extracellular fluid and
are endocrine glands ductless
yes
endocrine glands secretions are ____
hormones