Bi106 Lecture Exam One

Front 1

Classification of Epithelia:
Both Names:Simple Squamous
Type: Mesothelium -What is it?

Back 1

Lines the ventral body cavities; the pleura, peritoneum, and pericardium each

Front 2

Classification of Epithelia:
Both Names:Simple Squamous
Type: Endothelium -What is it?

Back 2

The simple squamous epithelium lining the heart and all the blood vessels

Front 3

Classification of Epithelia:
Both Names:
- Stratified Squamous:
-Location and keratinized epithelium

Back 3

Found where mech. stresses are severe; apical layers have keratin that make the surface layers tough and water resist; here the epithelium is said to be keratinized.

Front 4

Classification of Epithelia:
Both Names:
- Stratified Squamous:
-Nonkeratinized

Back 4

provides resistance to abrasion, but will dry out and deteriorate unless kept moist; found in oral cavity, pharynx, esophagus,rectum, anus and vagina

Front 5

Classification of Epithelia:
Second Name:
-Cuboidal Epithelia

Back 5

resemble hexagonal boxes;appear square, nucleus is near the center and distance b/w nuclei is equal to the height of the epithelium

Front 6

Classification of Epithelia:
Both Names:
-Simple Cuboidal

Back 6

provides limited protection; found in areas where secretion or absorption takes place, eg. kidney tubules

Front 7

Classification of Epithelia:
Both Names:
-Simple Cuboidal:
-does this secrete enzymes?

Back 7

yes, and buffers and line the ducts that discharge those secretions; eg. thyroid gland secretes thyroxine via simple cuboidal epi that line the follicles of the thyroid

Front 8

Classification of Epithelia:
Both Names:
-Stratified Cuboidal

Back 8

rare, found in ducts of sweat glands and in larger ducts of other exocrine glands like the mammory glands

Front 9

Classification of Epithelia:
Second Name:
-Transitional

Back 9

-line the renal pelvis, ureters and bladder; when stretched it's stratified, nonkeratinized epi.
-the empty bladder has many layers, outer cells are usually rounded cuboidal; the design of the transitional epi allows for distension w/o damage to component cells

Front 10

Classification of Epithelia:
Second Name:
-Columnar

Back 10

hexagonal, height is much greater than width; nuclei are crowded in a narrow band close to basal lamina and height of the epithelium is several times the distance b/w the nuclei

Front 11

Classification of Epithelia:
Both Names:
-Simple Columnar

Back 11

provides protection; found in areas where absorption or secretion occurs; lines the stomach, intestinal tract, uterine tubes and exretory ducts.

Front 12

Classification of Epithelia:
Both Names:
-Pseudostratified Columnar

Back 12

includes a mix of cell types; b/c their nuclei are situated at varying distances from the surface, it appears to be stratified or layered, but it's not b/c all cells are attached to basal lamina

Front 13

Classification of Epithelia:
Both Names:
-Pseudostratified Ciliated Columnar

Back 13

like the pseudostratified columnar, but have cilia, found in nasal cavity, trachea, bronchi, and in male reproductive tract

Front 14

Classification of Epithelia:
Both Names:
-Stratified Columnar

Back 14

rare, protect the pharynx, urethra, and anus; may have two layers, if more than 2, only surface cells have columnar shape

Front 15

Glandular Epithelia
-How are they classified?

Back 15

by the type of secretions released, structure of the gland and the mode of secretion