Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
9 Cards in this Set
- Front
- Back
epithelial tissue
|
covers the body surfaces, lines its cavities, and forms the major portion of many human glands
|
|
muscle tissue
|
contracts to provide body movement or movement of things in or through the body
|
|
nerve tissue
|
conducts electrical impulses between all parts of the body and between the external environment and the body
|
|
desmosomes
|
a submicroscopic space separating the opposing cell membranes containing keratin filaments anchoring the two cells
|
|
three types of junctions in human tissues
|
tight junction
adhering junction gap junction |
|
tight junctions
|
Characteristic Specializations in cell membranes:
belts of protein that isolate parts of plasma membrane Width of intercellular space: intercellular space disappears when the two adjacent membranes lie adjacent Function: form a barrier prohibiting movement of substances between cells |
|
adhering junctions
|
Characteristic Specializations in cell membranes:
buttonlike welds joining opposing cell membranes Width of intercellular space: normal size 24nm Function: holds cells tightly together |
|
gap junctions
|
Characteristic Specializations in cell membranes:
Channels or pores through the two cell membranes and across the intercellular space Width of intercellular space: intercellular space greatly narrowed to 2 nm Function: provide for electrical communication between cells and for flow of ions and small molecules between cells |
|
types of epithelial tissue
|
simple squamous
simple cuboidal simple columnar pseudostratified squamous stratified squamous stratified cuboidal stratified columnar transitional |