4.1 Types of tissues Flashcards
A tissue is a ?
group of cells that usually have a common origin in an embryo and function together to carry out specialized activities
Which tissue is
This tissue allows the body to interact with both its internal and external environments.
Epithelial Tissue.
Which tissue is this?
store energy reserves as fat, and help provide the body with immunity to disease-causing organisms.
Connective Tissue
Which tissue has this function?
generates heat that warms the body.
Muscular Tissue
Which junction
consist of weblike strands of transmembrane proteins that fuse together the outer surfaces of adjacent plasma membranes to seal off passageways between adjacent cells
Tight Junctions
Which cells have tight Junctions
Stomach Cells
Intestinal cells
Urinary Bladder cells
Tight Junctions help They inhibit the passage of
Block substances between cells and prevent the contents of these organs from leaking into the blood or surrounding tissues.
Block substances between cells and prevent the contents of these organs from leaking into the blood or surrounding tissues.
This Junctions contains a plaque
Adherens Junctions
Where is Adherins plaque located
The plaque is located on the inside of the plasma membrane. That attaches both membrane together.
What are between The plaque in a Adhering Junction
Transmebrane Glycoproteins called Cadherens
What does the Adhesion belt in a Ahderens Junction do?
Helps with stretching of the cell.
Example: Lung, Bladder, skin, Intestine.
Which type of cell junction prevents the contents of organs from leaking into surrounding tissues?
Tight Junctions
Which types of cell junctions are found in epithelial tissue?
In Desmsemes Junctions what do their plaques connect too
Intermediate filaments
Desmsemes Junction function
Desmosomes prevent epidermal cells from separating under tension and cardiac muscle cells from pulling apart during contraction.
How do Hemidesmosomes Look Like?
resemble desmosomes, but they do not link adjacent cells.
the transmembrane glycoproteins in hemidesmosomes?
integrins rather than cadher- ins.
In Hemidesmosomes the Integrins link with what protein
Laminin
What is hemidesmosomes Function?
anchor cells not to each other but to the basement membrane.
What is gap junctions, Function membrane proteins called connexins form tiny fluid-filled tunnels called connexons that connect neighboring cells
membrane proteins called connexins form tiny fluid-filled tunnels called connexons that connect neighboring cells
Which type of cell junction functions in communication between adjacent cells?
Gap Junction
What are some differences of Epithelial and Connective tissue.
Packing:
Epithelial: Tightly packed
Connective tissue: Loosely fit
ECF
Epithelial: No ECF or very little
Connective: A lot of ECF
Vascular
Epithelial: No blood
Connective: Vascular
Why are epithelial and connective tissues found adjacent to each other?
epithelial tissue lacks blood vessels and forms sur- faces, it is always found immediately adjacent to blood vessel–rich connective tissue, which enables it to make the exchanges with blood
Epithelial tissue is arranged in two general patterns in the body
What are they?
: (1) covering and lining various sur- faces and (2) forming the secreting portions of glands.
Functionally, epithelial tissue protects, secretes (mucus, hormones, and enzymes), absorbs (nutrients in the gastrointestinal tract), and excretes (various substances in the urinary tract).
(1) covering and lining various surfaces
(2) forming the secreting portions of glands.
