BIOL 3150 CHAPTER 4 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
Gastrulation
formation of digestive tract, forms trilaminar embryo
Trilaminar Embryo
3 germ layers (endoderm, mesoderm, ectoderm)
Histology
study of tissues and their relationships within organs
In what 3 ways do the primary tissue types differ?
structure of specialized cells, cell function, amount and contents of extracellular matrix
Epithelial Tissue
covers or lines every body surface and all body cavities
Which germ layer(s) forms the epithelium?
ectoderm, mesoderm, endoderm
Epithelium
composed of one or more layers of closely packed cells between 2 compartments
having different components
General characteristics of an epithelium
cellularity, polarity, attachment, avascularity, innervation, high regenerative capacity
Cellularity of Epithelial Tissue
composed almost entirely of cells bound closely together by intercellular junctions with
minimal amount of extracellular matrix in between
, Apical Surface
top surface of epithelium exposed to external or internal environment; possibly contains
cilia or microvilli
Lateral Surface
where intercellular junctions are found
Basal Surface
the bottom surface where the epithelium is attached to underlying connective tissue
Basement Membrane
structure produced by epithelium and underlying connective tissue that is bound to the
basal surface of the epithelium; 3 laminae layers
Functions of Basement Membrane
physical support, anchor epithelium to connective tissue, regulate movement of large
molecules in and out
Lamina Propria
top layer of connective tissue that connects to the basement membrane
Avascularity of Epithelial Tissue
lack blood vessels
Innervation of Epithelial Tissue
richly innervated to detect changes in the environment at a particular body or organ
surface region
High Regeneration Capacity of Epithelial Tissue
damaged/lost epithelial cells are generally replaced as fast as they are lost; this occurs
through mitotic divisions of stem cells
WITH COMPLETE SOLUTIONS VERIFIED
Gastrulation
formation of digestive tract, forms trilaminar embryo
Trilaminar Embryo
3 germ layers (endoderm, mesoderm, ectoderm)
Histology
study of tissues and their relationships within organs
In what 3 ways do the primary tissue types differ?
structure of specialized cells, cell function, amount and contents of extracellular matrix
Epithelial Tissue
covers or lines every body surface and all body cavities
Which germ layer(s) forms the epithelium?
ectoderm, mesoderm, endoderm
Epithelium
composed of one or more layers of closely packed cells between 2 compartments
having different components
General characteristics of an epithelium
cellularity, polarity, attachment, avascularity, innervation, high regenerative capacity
Cellularity of Epithelial Tissue
composed almost entirely of cells bound closely together by intercellular junctions with
minimal amount of extracellular matrix in between
, Apical Surface
top surface of epithelium exposed to external or internal environment; possibly contains
cilia or microvilli
Lateral Surface
where intercellular junctions are found
Basal Surface
the bottom surface where the epithelium is attached to underlying connective tissue
Basement Membrane
structure produced by epithelium and underlying connective tissue that is bound to the
basal surface of the epithelium; 3 laminae layers
Functions of Basement Membrane
physical support, anchor epithelium to connective tissue, regulate movement of large
molecules in and out
Lamina Propria
top layer of connective tissue that connects to the basement membrane
Avascularity of Epithelial Tissue
lack blood vessels
Innervation of Epithelial Tissue
richly innervated to detect changes in the environment at a particular body or organ
surface region
High Regeneration Capacity of Epithelial Tissue
damaged/lost epithelial cells are generally replaced as fast as they are lost; this occurs
through mitotic divisions of stem cells
