Bio 168 Tissues Questions Correct
Answers 2025 New Update
Tissues - Answers -✔✔ a group of specialized cells and extracellular material around
them.
Histology - Answers -✔✔ microscopic study of tissues
Epithelial tissue characteristics - Answers -✔✔ Lacks blood vessels (materials must
move by diffusion from underlying Connective Tissue)
Covers body surface and forms glands
Very little extracellular matrix
Has distinct tissue surfaces (Free (apical), nasal, lateral
Cells connect to surrounding cells and extracellular matrix
High regeneration capacity
basement membrane - Answers -✔✔ Connects basal later to underlying tissues.
Consists of two layers
Made of specialized extracellular material secreted by the epithelial cells (Collagen,
Glycoproteins, proteoglycans)
Supports and guides cells migration during tissue repair
Porous to allow movement of materials to and from the epithelial cells above.
Epithelial Tissue Functions - Answers -✔✔ protection, barrier, secretion, passage of
substances, absorption
Classification of Epithelia Cells - Answers -✔✔ Squamous: flat, scare like
Cuboidal: equal in height and width
Columnar: taller than wide
Simple squamous - Answers -✔✔ single layer of flat cells
Functions: Diffusion/filtration
Location: air sacs in lungs, lining of heart, blood and lymphatic vessels
simple cuboidal - Answers -✔✔ single layer of cube shaped cells
Function: secretion/absorption
Location: Ducts and secretory portions of small glands, kidney tubules.
simple columnar - Answers -✔✔ Single layer of tall cells
, Function: ciliated- moves particles, Smooth- absorbs and secretes mucous and
enzymes.
Location: Bronchi, uterine tubes, uterus, digestive tract.
psudostratified columnar - Answers -✔✔ Like columnar but irregular shaped.
Function: secretes and moves mucous (with cilia)
Location: Trachea, upper respiratory tract
stratifed squamous - Answers -✔✔ multiple layers of flat cells
Function: protects agains abrasion, barrier agains infection.
Location: skin and it lines the esophagus, mouth, and vagina
Stratifed cuboidal - Answers -✔✔ Multiple layers of cube like cells
Function: secretions/absorption
Location: sweat, salivary, and mammary glands.
stratified columnar - Answers -✔✔ Multiple layers of tall, thin cells
Function: protection/secretion
Location: mammary glands, larynx, part of the male urethra
transitional cells - Answers -✔✔ change shape; the apical cells are cuboidal when the
tissue is relaxed and squamous when the tissue is stretched
Function: accommodates fluctuations in volume
Location: urinary bladder, ureters, urethra
Free Surfaces of epithelium - Answers -✔✔ smooth, microvilli, cilia, folds, specialized
microvilli
Desmosomes - Answers -✔✔ Anchoring junctions that prevent cells from being pulled
apart
Hemidesmosomes - Answers -✔✔ attach epithelial cells to the basement membrane
preventing movement of the tissue
tight junctions - Answers -✔✔ hold cells together, form permeability barrier
adhesion belt - Answers -✔✔ Found just below the tight junction, acts as a weak glue
that holds cells together
Gap connections - Answers -✔✔ Protein channels that aid intercellular communication
Answers 2025 New Update
Tissues - Answers -✔✔ a group of specialized cells and extracellular material around
them.
Histology - Answers -✔✔ microscopic study of tissues
Epithelial tissue characteristics - Answers -✔✔ Lacks blood vessels (materials must
move by diffusion from underlying Connective Tissue)
Covers body surface and forms glands
Very little extracellular matrix
Has distinct tissue surfaces (Free (apical), nasal, lateral
Cells connect to surrounding cells and extracellular matrix
High regeneration capacity
basement membrane - Answers -✔✔ Connects basal later to underlying tissues.
Consists of two layers
Made of specialized extracellular material secreted by the epithelial cells (Collagen,
Glycoproteins, proteoglycans)
Supports and guides cells migration during tissue repair
Porous to allow movement of materials to and from the epithelial cells above.
Epithelial Tissue Functions - Answers -✔✔ protection, barrier, secretion, passage of
substances, absorption
Classification of Epithelia Cells - Answers -✔✔ Squamous: flat, scare like
Cuboidal: equal in height and width
Columnar: taller than wide
Simple squamous - Answers -✔✔ single layer of flat cells
Functions: Diffusion/filtration
Location: air sacs in lungs, lining of heart, blood and lymphatic vessels
simple cuboidal - Answers -✔✔ single layer of cube shaped cells
Function: secretion/absorption
Location: Ducts and secretory portions of small glands, kidney tubules.
simple columnar - Answers -✔✔ Single layer of tall cells
, Function: ciliated- moves particles, Smooth- absorbs and secretes mucous and
enzymes.
Location: Bronchi, uterine tubes, uterus, digestive tract.
psudostratified columnar - Answers -✔✔ Like columnar but irregular shaped.
Function: secretes and moves mucous (with cilia)
Location: Trachea, upper respiratory tract
stratifed squamous - Answers -✔✔ multiple layers of flat cells
Function: protects agains abrasion, barrier agains infection.
Location: skin and it lines the esophagus, mouth, and vagina
Stratifed cuboidal - Answers -✔✔ Multiple layers of cube like cells
Function: secretions/absorption
Location: sweat, salivary, and mammary glands.
stratified columnar - Answers -✔✔ Multiple layers of tall, thin cells
Function: protection/secretion
Location: mammary glands, larynx, part of the male urethra
transitional cells - Answers -✔✔ change shape; the apical cells are cuboidal when the
tissue is relaxed and squamous when the tissue is stretched
Function: accommodates fluctuations in volume
Location: urinary bladder, ureters, urethra
Free Surfaces of epithelium - Answers -✔✔ smooth, microvilli, cilia, folds, specialized
microvilli
Desmosomes - Answers -✔✔ Anchoring junctions that prevent cells from being pulled
apart
Hemidesmosomes - Answers -✔✔ attach epithelial cells to the basement membrane
preventing movement of the tissue
tight junctions - Answers -✔✔ hold cells together, form permeability barrier
adhesion belt - Answers -✔✔ Found just below the tight junction, acts as a weak glue
that holds cells together
Gap connections - Answers -✔✔ Protein channels that aid intercellular communication
