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