Tissues - Chapter 5 Notes Flashcards
a group of cells that have a common structure and function
tissue
four major types of tissues in the human body
epithelial
connective
muscle
nerve
points of contact between the plasma membranes of cells
cell junctions
3 types of cell junctions
tight function
anchoring junction
Gap junction
fluid tight cells
tight junction
hold cells to other cells or other structures
anchoring junction
permits electrical and chemical signals to pass from cell to cell
gap junction
location of anchoring junction
outer layer of skin, muscles, gastrointestinal tract
location of gap junction
parts of nervous system, cardiac muscles
where are anchoring junctions common
in tissues subjected to friction and stretching
____________ do not have gap junction and therefore they cannot communicate with one another. As a result, _________ is not controlled.
Cancer cells, cell division
Epithelial Tissue General Characteristics: Functions
protection, diffusion, absorption, secretion
Epithelial Tissue General Characteristics: Fastest or slowest mitotic/replication rate
fastest
Epithelial Tissue General Characteristics: mostly cells and __________ extracellular fluid (matrix)
very little
Epithelial Tissue General Characteristics: vascular or avascular
avascular
Epithelial Tissue General Characteristics: have a ________ supply
nerve
Epithelial Tissue General Characteristics: these tissues contain the most ____________
cell junctions
Epithelial Tissue General Characteristics: tissues can be arranged in single layer or multiple layers.
Single layer of cells is called ___________
Multiple layer of cells is called ________
Having a mixture of cell shapes in one layer is called _____________ (appears multilayered but is not)
simple, stratified, pseudostratified
Epithelial Tissue General Characteristics: cell shapes can be varied (____________, __________, __________)
squamous, cuboidal, columnar
thin flat cells in EPITHELIAL TISSUE
squamous
cells that are as tall as wide in EPITHELIAL TISSUE
cuboidal
cells that are taller than they are wide in EPITHELIAL TISSUE
columnar
cells that can change shape due to tension in EPITHELIAL TISSUE
transitional
____________ can replace itself quicker than any tissue
epithelial
the fluid in between the spaces in cells
extracellular/intercellular fluid