Chp. 4 Tissue Level of Organization Flashcards
Tissue is…
collection of cells that function together
Tissues can be 1. ____ 2. ____ 3. ____
solid, semisolid, liquid
consistency of tissues depends on kinds of ____ present, how they are ____, the _____ between them, kind of _____ and _____ found between cells in extracellular matrix
cells, arranged, connections, fibres, extracellular material
Histology
study of tissues
Pathologist
laboratory study of cells and tissues
Pathologists aid physicians in making ____, and analyze ____, and perform ____
diagnosis, biopsies, autopsies
What are 4 different types of tissues?
- Epithelial Tissues
- Connective Tissue
- Muscle Tissue
- Nervous Tissue
Epithelial Tissue covers ____, lines hollow ____ and forms _____
body surface, organs, glands
Covering and lining epithelium does what?
lines and covers body cavities and ducts
Glandular Epithelium does what?
forms glands
Connect tissue ____ and ___ body and organs
protects, supports
Some connective tissue ____ organs together, some ____ energy, some ____ materials and provide _____, and some ____ body
bind, store, transport, immunity, support
Muscle Tissue generates ____ force and makes body ____
physical, move
What are 3 things Muscle Tissue do?
- maintain posture
- move substances
- produce heat
Nervous Tissue ___ changes ____ and ____ body
detects, inside, outside
What are 5 general features of Epithelial tissue?
- Cellularity
- Polarity
- Attachment
- Avascualrity
- Regeneration
- Cellularity: refers to epithelia cells arranged in ____, either ___ or ____ layers
sheets, single, multiple
- Polarity: is ____ sides with ____ properties
two, contrasting
Epithelial cell has ____ surface and ____ surface
apical, basal
Apical surface is?
free or exposed surface
Basal surface is?
attached surface, attached to underlying tissue
Apical surface may contain ___ and ____
cilia, microvilli
- Attachment: base of epithelium attached to _____ membrane
basement
- Avascularity: epithelia tissue is _____, gets nutrients by ______
avascular, diffusion
Avascular
without blood vessels
- Regeneration: epithelial tissues have high capacity for ____
renewal
Pap Smear is when _____ cells are sloughed off ____ layer of cervix
epithelial, apical
Intracellular connections are ______
cell junctions
Cell Junctions occur where cell membrane contacts cell ______ of neighbouring cell or ______ material
membrane, extracellular
What are 3 types of Cell Junctions?
Tight Junctions, Gap Junctions, Desmosomes
cell junctions are part of what kind of cells?
epithelial
Tight Junctions are?
two outer surfaces of membrane that are fused together
Tight Junctions are fused together by?
strips of proteins
Do Tight Junctions let anything pass through?
no
Gap Junctions are?
two cells joined together with gaps in them
Gap Junctions joins ____ of two cells
cytoplasm
Connexions are found in ____ where its important for group of cells to ____
gap junctions, communicate
connexions allow ____ and _____ to diffuse easily from one cell to another
ions, small molecules
Desmosomes are _____ connections
strong
Desmosomes are made of _____ and are connected to cells _____
transmembrane proteins, cytoskeleton
Desmosomes are found in tissues where cells have to?
withstand a lot of force
What are 2 types of Desmosomes
Button Desmosomes and Hemidesmosomes
Button Desmosomes connect _______
adjacent cells together
Hemidesmosomes connect _____ to ______
epithelial cells, basement membrane
What are three classifications of Epithelia?
Squamous, Cuboidal, Columnar
What are two kinds of layers in Epithelia cells?
simple and stratified
Simple Squamous lines?
peritoneal cavity, blood vessels
Simple Squamous function?
reduce frictions, absorption/secretion
Stratified Squamous lines?
vagina, oral cavity, pharynx
Stratified Squamous function?
protection abrasion, pathogens, chemical attack
Simple Cuboidal lines?
glands, ducts, kidney tubules
Simple Cuboidal function?
secretion, absorption, protection
Stratified Cuboidal lines?
ducts
Stratified Cuboidal function?
secretion, absorption, protection
Transitional Epithelium is unusual _____ epithelium
stratified
Transitional Epithelium location?
urinary system
Transitional Epithelium function?
allows expansion, recoil after stretching
Simple Columnar location?
small intestine, stomach, gall bladder
Simple Columnar function?
protections, secretion, absorption
Stratified Columnar location?
pharynx, anus, urethra
Stratified Columnar function?
protection
Pseudostratified Ciliated Columnar location?
nasal cavity, trachea, bronchi
Pseudostratified Ciliated Columnar function?
protection, secretion, mucus movement
Pseudostratified Ciliated Columnar are ____ types of cells, that vary ____ and functions
several, shape
Basement membrane consists of ____ layers of _____ material
two, extracellular
What are two layers of basement membrane?
basal lamina, reticular lamina
Basal lamina is layer _____ to basal surface of ____ cells, and is ______
closest, epithelial, selective filter
Basal Lamina is made up of?
Basal Lamina is produced by?
collagen fibers
epithelial cells
Reticular Lamina is layer ____ to basal lamina
deeper
Reticular Lamina contains? ____ and ____
Reticular lamina is produced by?
structural proteins and reticular fibres
connective tissue
4 functions of basement membrane?
- support epithelial tissue
- guide cells during growth/repair tissue
- barrier
- filter
Glandular Epithelium function?
secretion
What are two types of glandular epithelium?
Endocrine Glands and Exocrine Glands
Do endocrine glands possess ducts?
no
Do Exocrine glands possess ducts?
yes
Endocrine glands secrete into _____
bloodstream
Exocrine glands secrete into _____
ducts
Exocrine gland structure can be ____ or _____
unicellular, multicellular
Unicellular is made up of _____ cells and secrete _____
goblet, mucins
Multicellular is made up of _____ sheets
secretory
Mesothelium and Endothelium are part of ________
simple squamous epithelial cells
Mesothelium is found in _____
body cavity
Endothelium is found in _____
heart
Method of secretions in Exocrine (3)
Merocrine
Apocrine
Holocrine
Merocrine is _____ and is _____ substance
exocytosis, watery
Apocrine is ______ and loses _____
exocytosis, cytoplasm
Holocrine it ____ _____ cells
destroys, gland
What are 3 types of secretion?
Serious gland
Mucous gland
Mixed Exocrine Glands
Serous gland secretes _____ and ____
watery solution, enzymes
Mucous Gland secretes ____
mucin
Mixed Exocrine Glands secrete _____, _____ and ____
watery solution, enzymes, mucins