Midterms | Tissues Flashcards
Groups of cells that has a common origin
Tissue
Carries out special activities
Tissues
Study of tissues
Histology
Histo meaning
Tissue
Logy meaning
Study
Physiccians that specializes in cells and tissues
Pathologist
Term that means “diseases”
Patho
Term that refers to an individual who studies a specific concept
Logist
Types of tissues
Epithelial tissue
Connective tissue
Muscle tissue
Nervous tissue
Covers body surfaces and line hollow organs, body cavities, and ducts
Epithelial tissue
Forms the glands
Epithelial tissue
The epithelial tissue covers (1) and line (2), (3), and (4)
- body surfaces
- hollow organs
- body cavities
- ducts
Protects and supports the body
Connective tissue
Binds organs together
Connective tissue
Stores energy reserves as fats
Connective tissue
Helps in immunity
Connective tissue
Functions in contraction and generation of force
Muscle tissue
Generates heat for warmth
Muscle tissue
Muscle tissue: (1) and (2) of force; generates (3) for warmth
- contraction
- generation
- heat
Detects changes in and out of the body
Nervous tissue
Generates electric signals
Nervous tissue
What do nervous tissues generate?
Electric signals
Nerve action potential/ nerve impulses that activates muscular contractions and glandular secretions
Electric signals
Electric signals are (1)/(2) that activates (3) contractions and (4) secretions
- nerve action potential
- nerve impulses
- muscular
- glandular
Contact points between the plasma membrane of tissue cells
Cell junctions
Types of cell junctions
Tight junctions
Adherens junctions
Desmosomes
Hemidesmosomes
Gap junctions
Made-up of web-like strands of transmembrane proteins that fuse together the outer surface
Tight junctions
Functions of tight junctions
- Seal off passageways b/n adjacent cells
- Inhibit passage of substances and prevent the contents of organs to leak into the surrounding tissues/ blood
Seal off passageways b/n adjacent cells
Tight junctions
Inhibit passage of substances and prevent the contents of organs to leak into the surrounding tissues/ blood
Tight junctions
Organs involved in tight junction
Stomach
Intestines
Urinary bladder
Contains plaque
Adherens junctions
Dense layer of protein (inside plasma membrane), attached to membrane proteins to microfilaments
Plaque
Resists separation during various contractile
Adherens juction
An example of this junction is when the food moves through the intestines
Adherens juction
Transmembrane glycolipids joins the cell
Cadherins
Extensive zones that encircle the cell
Adhesion belts
Desmosomes also contains — and — which are present in adherens juctions
plaque; cadherins
Where are desmosome plaques attached?
intermediate filaments
These extend to each cell’s desmosomes
Intermediate filaments
Function of desmosomes
Stability of cells
Organs involved in desmosomes
Epidermis
Cardiac muscle of the heart
Resembles desmosomes but do not link adjacent cells
Hemidesmosomes
Transmembrane glycoproteins are attached to the protein laminin
Integrins
Integrins: (1) are attached to the (2)
- Transmembrane glycoproteins
- protein laminin
Function of hemidesmosomes
Anchor cells to basement membranes
What are connexins?
membrane proteins
These form tiny fluid-filled tunnels called connexons
Connexins
Connexins (membrane proteins) form tiny fluid-filled tunnels called —
connexons
3 functions of gap junctions:
1. Small molecules can be (1) from the (2) to another cell
2. Transfers (3)
3. Allows cells to (4)
- diffused
- cytosol
- nutrients and wastes
- communicate
They are arranged in continuous sheet
Epithelial tissue
This forms covering and linings
Epithelial tissue
3 functions of epithelial tissue
1. (1) barries that limit/aid (2) of substances
2. (3) surface release products
3. (4) that resist abrasion
- Selective
- transfer
- Secretory
- Protective barrier
Other term for epithelial tissues
Epithilium
Surfaces of the epithelial tissue
Apical (Free) Surface
Lateral Surface
Basal Surface
Basal Lamina
Reticular Lamina
Top/ superficial layer of the epithelium
Apical (free) Surface
Faces the body surface/ cavity/ lumen
Apical (Free) Surface
Deepest layer of epithelium that is an chored to the basement membrane
Basal Surface
Close to epithelial and secreted by epithelial cells
Basal Lamina
Closer to connective tissue and contains collagen
Reticular Lamina
Types of epithelial tissue
- Covering and Lining Epihtelium
- Glandular Epithelium
Outer covering of the skin and some internal organs
Covering and lining epithelium
Forms the finner lining of the blood vessels, ducts, body cavities, interior of respiratory, digestive, urinary, and reproductive organs
Covering and lining epithelium
Secreting glands of the glandular epithelium
Thryoid gland
Adrenal gland
Sweat gland
Types of covering and lining epithelium according to the arrangement of cells in layers
Simple Epithelium
Pseudostratified epithelium
Stratified epithelium
Epithelium with a single layer
Simple epithelium
Epithelium that functions in diffusion, osmosis, filtration, secretion, and absorption
Simple epithelium
Appears to have multiple layers of cells because the cell nuclei lie at different levels
Pseudostratified epithelium
Why does pseudostratified epithelium appears to have multiple layers of cells?
because the cell nuclei lie at different levels
Epithelium that contains cilia
Pseudostratified epithelium
Epithelium that consists of two or more layers of cells
Stratified epithelium
Types of covering and lining epithelial tissue according to its cell shape
Squamous cell
Cuboidal cell
Columnar cell
Transitional cell
flat and thin cell shape
Squamous cell
Cell shape that function in passage
Squamous cell
Tall and wide, cube/ hexagon cell shape
Cuboidal cell
Compare and contrast cuboidal and columnar cells
Cuboidal cell are tall and wide, and can be cube/hexagon in shape. Columnar cells are taller and wide. Both contains microvilli for secretion and absorption. However, columnar cells also function for protection
Changing cell shapes (squamous-cuboidal)
Transitional cell
Cell shape that functions for distention/ stretching
Transitional cell
Function of transitional cell
Distention/ stretching
Function of glandular epithelium
Secretion
Types of glandular epithelium
Exocrine
Endocrine
Differentiate exocrine and endocrine
Endocrine secretes hormones within the body. Exocrine secretes products into ducts and multicellar cells
Unicellular and multicellular cells
Exocrine glands
Functional classifications of exocrine glands and their definitions
Merocrine glands: No part of the cell is detached
Apocrine glands: Top part of the cell is detached
Holocrine glands: Entire cell is detached
Contains immature cells with name ending in ‘blasts’
Connective tissues
Keyword for mature and immature cells
Mature: cyte
Immature: blasts
Example of connective tissues
fibroblast
Has extracellular matrix
Connective tissue
2 classificatiosn of extracellular matrix
Ground substance
Fibers
Types of cells under connective tissue
Fibroblasat
Macrophages
Plasma Cells
Mast Cells
Adipocytes
White blood cells
flat cells that secrete fibers
fibroblast
most numerous type of cells
fibroblast
a type of WBC that arises from monocytes
macrophages
they are irregular in shape and engulf bacteria and cellular debris (phagocytosis)
Macrophages
Classifications of macrophages
Fixed macrophage
Wanering macrophage
Develops from B lymphocyte (a WBC)
Plasma cells
What WBC does plasma cells develops from?
B lymphocyte
Secretes antibodies an dproteins
Plasma cells
In what tracts are plasma cells present?
GI tract and respiratory tract
Aside from the 2 tracts, where else can plasma cells be found?
Salivary galnd
Lymph nodes
Spleen
Red bone marrow
These are abundant in blood vessel
Mast cells
These produces histamine
Mast cells
Differentiate histamine vs anti-histamine
Histamine are substances that dilate blood vessels while anti-histamine constrict blood vessels
These store triglycerides
Adipocytes
Where can adipicytes be found?
Skin
Hear
Kidneys
Cells that migrate
WBCs
Where are WBcs abundant?
Connective tissue
Classification of ground substances
Fluid
Semifluid
Gelatinous
Calcified
Supports cells, binds, sotres water, and provides a medium for exchange of substances b/n the blood and cells
Ground substances
Classification of fibers
Elastic fibers
Reticular fibers
These have elastic proprety and are plentiful in the skin, blood vessels, walls, and lung tissue
Elastic fibers
Where are elastic fibers plentiful?
Skin
Blood
Vessels
Walls
Lung tissue
Specific extracullar matrix that consists of collagen and function to provide support and strength
Elastic fibers
Classifications of connective tissue
Embryonic tissue
Mature connectiv etissue
Cartilage
Bone tissue
Liquid connective tissue
Other terms for muscular tissues
Muscle fibers or Myocytes
Cell shape of muscular tissues
Elongated cell
Typse of muscular fibers
Cardiac muscle
Smooth muscle
Skeletal muscle
Description, location, and function of cardiac muscle
branched, striated fibers
heart wall
pump blood to all parts of the body
Description, location, and function of smooth muscle
spindle-shaped; non striated
mostly organs
motion
Description, location, and function of skeletal miscle
long, cylindrical striated fibers
attached to tendons
motion. posture, heat, production, protection
Cells under nervous tissues
Neurons
Neuroglia
Nerve cells
neurons
Cells sensitive to stimuli
Neuroms
Communication network of the body
neurons
Parts of the neuron
Cell body
Dendrites
Axon
Supportive functions that facilitates the functioning of communication networks
Neuroglia