BIOL Quiz 2
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BIOL Quiz 2
Tissues & Skin
Groups of similar cells with identical functions
What are the 4 types of tissue?
Where is epithelial tissue found? Are they secretory?
What are the 3 types of epithelial tissues?
Describe exocrine and endocrine glands
-Are they ducted or ductless?
Exocrine glands--ducted; ex. sweat, salivary, liver, pancreas
Endocrine glands--ductless; ex. hormones
-uses bloodstream for delivery
Describe epithelial linings
line outer and inner surfaces
thin and weak
underlain by basement membrane (connective tissue)
no vessels or nerves
Ex. Epidermis (skin)
Epithelial lining is categorized by 2 things:
-What are those 2 things?
-what is the criteria for each of those categories?
# of cell layers
: 1 layer
: >1 layer
: simple, but appears stratified
--always columnar, usually ciliated
--Ex. transitional epithelial or urinary bladder
Where do you find these types of epithelial cells?
Simple squamous--capillaries, alveoli, glomeruli
Simple columnar--most organs of the digestive tract (ex. stomach, small & large intestine)
Simple cuboidal--surface of ovaries, lining of nephrons, parts of the eye and thyroid
Stratified squamous--outermost layer of skin, inner lining of mouth, esophagus and vagina
Describe connective tissue:
-where is it found?
-what does it do?
All over body
mostly binds and supports
A few living cells in a matrix (surrounding environment)
The matrix is composed of 2 things:
What protein fibers are in the matrix?
Collagen--white fibers, unbranched, tough
Elastin--yellow, branched, & elastic
Reticulin--black, branched, tough
what are examples of ground substance in the matrix?
blood (WBC's and plasma)
What are the 7 types of connective tissue?
Describe areolar connective tissue
loose fibers in a soft gel
lines major vessels & nerves--supports them during articulation
2nd line of defense against infection
Explain how areolar connective tissue is the second line of defense against infection
underlies the skin (first line of defense)
full of macrophages--activated when infection arrives and seeks bacteria
Describe adipose connective tissue
-what 3 things make up this cell?
consists of adipocytes in loose fibers
larger than other cells
composed of cytoplasm, nucleus, and fat vacuole
Describe reticular connective tissue
supports parenchyma (soft tissue)
stroma--dense fibrous support composed of reticulin for soft organs (liver, spleen)
What are the 3 types of dense fibrous connective tissue?
What are examples of elastic dense F.C.T?
Ex. lungs, arteriole walls
Explain regular dense F.C.T
Mostly collagen (unbranched)
fibers are parallel
Ex. tendons and ligaments
Explain irregular dense F.C.T
mostly collagen (unbranched)
fibers are randomly arranged
Ex. pericardium (fat around heart), dura mater, heart valves, and sclera (whites of eyes)
What are the 3 types of cartilage?