Chapter 4: Epithelial and connective tissue Flashcards
Histology
the study of tissues
Four Basic Tissue Types
Epithelial
Connective
Muscular
Neural
Epithelium
An avascular layer of cells that forms a barrier that covers internal or external surfaces
Glands
Secretory structures derived from epithelia
What tissue type covers exposed surfaces and produces glandular secretion?
Epithelium
Which tissue type contracts to produce active movement?
Muscular
What tissue type conducts electrical impulses and carries information?
Neural
Which tissue type fills internal spaces and provides structural support?
Connective
Which tissue type forms a barrier that covers both internal and external surfaces?
Epithelia
The lack of blood vessels makes a tissue what?
avasucular
Cells that are exposed to both internal and external surfaces are said to what types of cells?
Apical
Epithelia are attached to what type of membrane?
basement membrane
Epithelial cells are occasionally or continually replace?
continually
What are the four functions of the epithelial tissue?
Physical protection
Permeability control
Sensation trigger
Specialized secretions
Glands that secrete onto a body surface using a duct are said to be what?
Exocrine
Glands that secrete into neighboring tissue via the blood are said to be what?
Endocrine
Gap junctions are associated with what type of proteins?
channel proteins
What are the three different types of cell junctions?
Tight junction, Gap junction, desmosomes
What structures increase surface area?
Microvilli
What structures move materials along the surface?
Cilia
Microvilli are found in what structures?
Intestinal lining, kidney tubules
Cilia are found in what structure?
airways, oviduct
Epithelium grows in what direction?
up from below
What shortens the life of epithelium?
exposure
What type of cells become new epithelium?
stem cells
If there is just one layer of epithelial cells they are said to be what?
Simple
Stratified
multiple layers of cells
pseudostratified
falsely appears to have multiple layers of cells
flat epithelium
squamous
cubic epithelium
cuboidal
tall epithelium
columnar
What is an example of simple squamous epithelium?
blood vessels
What is an example of simple cuboidal epithelium?
Nephrons
What is an example of simple columnar epithelium?
digestive organs
What is an example of pseudostratified ciliated columnar epithelium?
respiratory membranes
Transitional epithelium example
urinary bladder
Stratified squamous epithelium example
tongue surface
Glandular epithelium that secretes small quantities is said to be what and an example would be what ?
Mirocrane
salivary
Glandular epithelium that secretes a portion of the cell is said to be what and an example would be what?
Apical
breast milk
Glandular epithelium that secretes the entire cell contents is said to be what and an example would be what?
Holocrine
sebum
What are the functions of connective tissue?
Structural framework
Fluid and solute transport
Physical protection
Tissue interconnection
Fat storage
Microorganism defense
What types of cells build fibers?
Fibroblasts
Collagen fibers provides what to the connective tissue proper?
toughness
Reticular fibers provide what to the connective tissue proper?
Support
Elastic fibers provide what to the connective tissue proper?
resilience
What would be an example of loose connective tissue?
Adipose tissue
What would be an example of dense connective tissue?
tendons
Fluid connective tissue is comprised of what two things?
cells & a ground substance
What are two examples of fluid connective tissue and what are they made of?
Blood + H20 - RBCs, WBCs, platelets + plasma
Lymph - Lymphocytes + lymph fluid
What are two examples of supportive connective tissue and what are they made of?
Bone - osteocytes + collogen + calcium salts
Cartilage - chondrocytes + firm gel
Cartilage is avascular and is controlled by what?
fibrous pericardium
What are the three types of cartilage?
Hyaline, Elastic, Fibrocartilage
What are the cartilage cells called?
Chondrocytes
Chondrocytes occupy Chambers or pools called what?
Lacunae
How are nutrients spread through the cartilage?
diffusion
What substance prevents the development of blood vessels within cartilage which is under testing to help in cancer treatment?
antiangiogenesis factor
What are the two layers of the pericardium and what do they do?
Fiberous - support anf attachment
cellular - growth and maintenance
What are the two methods of cartilage growth and how do they differ?
Interstitial - from within
Oppositional- on surface
Osseous tissue is the same as what?
Bone
Bone matrix is made of what substance?
collogen fibers and calcium salts
Diffusion occurs through what structure within the bone?
Canaliculi
What covers the bone?
periosteum
What are the properties of membranes?
Barrier or interface, cover and protect, epithelium and connective tissue
What are the four types of membranes?
Mucus
serous
cutaneous
synovial
Mucous membranes do what
Lines cavities that connect to exterior
serous membranes do what
Line internal cavities
cutaneous membranes do what
Covers body surface
Synovial membranes do what
Lines joints