KIN 2500 Chapter : Chapter 3 SI
15 Mar 2019
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KIN 2500 – Tissues
Supplemental Instruction
1
Types of Tissues
• What is a tissue?
• Body tissues can be classified into four basic types of tissues
according to their structure and function. Describe their functions:
o _______: covers body surfaces, and lines hollow organs, body
cavities, and ducts; it also forms glands. Allows the body to
interact with both internal and external environments.
o _______: protects and supports the body and its organs.
o _______: composed of cells specialized for contraction and
generation of force.
o _______: detects changes in a variety of conditions inside and
outside of the body and responds by generating electrical
signals called nerve action potentials that activate muscular
contractions or gland secretions.
• Histology is the study of ______
• Cytology is the study of ______
Cell Junctions
• Cell junctions are contact points between the plasma membrane
of tissue cells. There are four major types of junctions.
• Tight Junctions:
o An example of where you could find tight junctions would be
• _________: contain plaque, a dense layer of proteins on the inside of
the plasma membrane (PM) that attaches both to membrane
proteins and to microfilaments of the cytoskeleton.
o Transmembrane glycoproteins called ______ join the cells.
o This type of junction helps epithelial surfaces resist separation
during various contractile activities. An example of this is
_________
• Like adherens junctions, ________ contain plaque and have
transmembrane glycoproteins that extend into the intercellular
space between adjacent cells membranes and attach cells to one
another.
o However, unlike adherens junctions, this plaque of this
junction, does not attach to microfilaments. It attaches to
________________________________________
o The purpose of desmosomes is to _________________________
• At gap junctions, membrane proteins ________ form tiny fluid-filled
tunnels called connexons that connect neighboring cells.
o Unlike tight junctions, the plasma membranes are __________
▪ This type of junction allows for the transportation of ions,
impulses, and small molecules between cells.
Epithelial Tissue
• Consists of cells arranged in continuous sheets in either single or
multiple layers.
KIN 2500 – Tissues
Supplemental Instruction
2
• Epithelial tissues have three major functions:
o 1.
o 2.
o 3.
• The surface that faces the body surface, a body cavity, the lumen
of an internal organ, or a tubular duct is called that _________. This
surface may contain microvilli or cilia.
• The surface that faces the adjacent cells on either side is the
________. This surface may contain tight junctions, adherens
junctions, desmosomes, and/or gap junctions.
• The surface that is opposite of the apical surface is the ________. This
surface is the deepest layer of epithelial cells and adheres to
extracellular material such as the basement membrane, a thin
extracellular layer.
• The basement membrane is composed of two parts
o __________– closer to epithelial cells. Contains proteins such as
laminin and collagen.
o __________– closer to the underlying connective tissue and
contains proteins such as collagen produced by connective
tissue cells called fibroblasts.
Surfaces of Epithelial Cells and the Structures and Location of the
Basement Membrane (ABC Diagram)
Classification of Epithelial Cells by Arrangement of Cells in Layers
Simple
Pseudostratified
Statified
_______
_______________
_____________________________________
KIN 2500 – Tissues
Supplemental Instruction
3
Classification of Epithelial Cells by Cell Shape
Squamous
Cuboidal
Columnar
Transitional
______________
_________________
_________________
Epithelial tissue can be divided into two types: covering and lining
epithelium and glandular epithelium.
Document Summary
Types of tissues: what is a tissue, body tissues can be classified into four basic types of tissues according to their structure and function. Describe their functions: _______: covers body surfaces, and lines hollow organs, body cavities, and ducts; it also forms glands. Cell junctions: cell junctions are contact points between the plasma membrane of tissue cells. Epithelial tissue: consists of cells arranged in continuous sheets in either single or multiple layers. Supplemental instruction: epithelial tissues have three major functions, 1, 2, 3, the surface that faces the body surface, a body cavity, the lumen of an internal organ, or a tubular duct is called that _________. This surface may contain microvilli or cilia: the surface that faces the adjacent cells on either side is the. This surface may contain tight junctions, adherens junctions, desmosomes, and/or gap junctions: the surface that is opposite of the apical surface is the ________.
