Epithelium and Pseudostratified Columnar Epithelium Essay

Submitted By roxylra247
Words: 1920
Pages: 8
Open Document
A&P study guide Chapters 6 and 7

1.) Define simple squamous: Simple squamous epithelium consists of only one layer of flat, scalelike cells. Because of this, substances can easily diffuse or filter through this type of tissue.

2.) Define pseudo stratified: Pseudostratified columnar epithelium is made up of one layer of cells that appears to be at least several layers (pseudo-, "false"; strata-, "layer"). However, despite their appearance, all cells are attached to the basement membrane. Some are taller and their nuclei rest near the top of the cell. Others are shorter and have nuclei that rest closer to the basement membrane.

3.) Define Transitional: Transitional epithelium is made up of an arrangement of differing cell shapes in a stratified sheet.

4.) Define Simple Cuboidal: Simple cuboidal epithelium is one layer of cuboidal cells resting upon a basement membrane. Many types of glands and their ducts, as well as the tubules of organs such as the kidney, are lined with this type of epithelium.

5.) Define Stratified Squamous:(Epidermis) Stratified squamous epithelium is characterized by multiple layers of cells with typical scalelike squamous cells at the outer surface of the epithelial sheet. This type of epithelium is best exemplified by skin tissue, which has a special hard protein called keratin in its cells.

6.) Define Simple Columnar: Simple columnar epithelium forms the surface of the mucous membrane that lines the stomach, intestine, uterus, uterine tubes, and trahcea.

7.) What is the function of sebaceous glands? Secrete oil for the lubrication and maintenance of the hair and skin. Wherever there is hair, there are sebaceous glands- at least two for each hair.

8.) What causes jaundice? Jaundice is a yellowish discoloration of the skin and other tissues, such as the "white" or sclera of the eye, can be caused by bile pigments. Jaundice also often occurs just after birth. Ultraviolet light is used to break down bile pigments in the skins and can help speed recovery in infants with moderate to severe cases of jaundice.

9.) What causes cyanosis? In some abnormal conditions, skin color changes because of an excess amount of hemoglobin that is low in oxygen and high in carbon dioxide. For this reason, skin with relatively little melanin will appear bluish (cyanotic) when its blood has a high proportion of in oxygenated hemoglobin. The blue coloration results when hemoglobin changes from a bright red to a dark, maroon-red color when it loses oxygen and gains carbon dioxide.

10.) What is sebum and What does it do? Sebum is the oil that keeps the hair supple and the skin soft and pliant. It also prevents excessive water loss and dehydration of the skin. Sebum lubricates and conditions the hair and surrounding skin, keeping it from becoming dry, brittle, and easily damaged.

11.) Define the integumentary system: The integumentary system is the skin and its appendages (including hair, nails, and glands)--is one of the most vital, diverse, complex, and extensive organs of your body.

12.) What are the appendages of the integumentary system? Hair, Nails, and Glands

13.) What are the causes of burns? Burns are thermal injuries or lesions caused by contact of the skin with fire or a hot object, even water. However, overexposure to UV light can cause serious sunburns. Corrosive chemicals and electric currents can also cause burns.

14.) What is ceruminous and what part of the body is it found? Ceruminous glands are a special type of apocrine sweat gland that appear in the external ear canal.

15.) What are the functions of surface film on the skin? These layers protect underlying tissues against invasion by microorganisms. These epithelial cells bar the entry of many harmful, chemicals, and reduce the possibility of mechanical injury to underlying structures. Because it is essentially waterproof, the skin protects us from dehydration caused by the loss of internal body fluids. The skin
Show More

Related Documents: Epithelium and Pseudostratified Columnar Epithelium Essay

AP 1 Histology Essay

Oval to round shape, single layer cell Simple Columnar (stomach) Connective tissue, single layer cells Simple Columnar (duodenum) Long cells, large nuclei Stratified Squamous (keratinized) Keratinized cells, multiple layer cells Stratified Squamous (non-keratinized) Thin layer cells Pseudostratified Ciliated Columnar Connective tissue Transitional Oval shape, thin layer cells Stratified Cuboidal (online) Oval shape, uneven layer cells Stratified Columnar (online) Long shape cells Questions: A. Why…

Words 787 - Pages 4

Homeostasis And Body Temperature Essay

Number of Layers Sqaumous Cuboidal Columnar Simple Stratified Pseudostratified Pseudostratified epithelium appears to be layered, but true layers do not exist because each cell touches the basement membrane Simple epithelium has a single layer of cells, whereas stratified epithelium has layers of cells piled one on top of another. Classification of Epithelium Description Function Location Simple…

Words 426 - Pages 2

Tissues: Epithelium and Connective Tissue Essay

and reabsorb needed materials from the urine. Sweat is also excreted from the body by epithelial cells in the sweat glands. 6. Diffusion: simple epithelium promotes the diffusion of gases, liquids and nutrients. Because they form such a thin lining, they are ideal for diffusion of gases (eg. Walls of capillaries and lungs) 7. Cleaning: ciliated epithelium assists in removing dust particles and foreign bodies which have entered the air passages 8. Reduces friction: The smooth, tightly-interlocking…

Words 2048 - Pages 9

Histo Practice Exam 1 Essay

1. Fixation 2. formaldehyde 3. glutaraldehyde 4. Dehydration 5. clearing 6. epoxy resins, paraffin 7. microtome 8. glass slide, wire grid 9. Hematoxylin, Eosin 10. Eosin 11. Hematoxylin 12. cationic/ + charged 13. acidophilia 14. anionic/ – charged 15. basophilia 16. RNA 17. pink, purple 18. False, it differs 19. insoluble molecules 20. small, organic solvents 21. Shrinkage 22. artificial spaces, molecules 23. artifacts 24. chemical composition 25. enzymes 26. antibodies…

Words 1255 - Pages 6

Essay on Anatomy SG

filled with keratin. Outer layer of the skin. Functions of the following: cuboidal epithelium; responsble for seretion and absorbtion; ciliated types propel mucus and reproductive cells simple columnar epitheliume; Secretes and absorbs; ciliated types propel mucus or reproductive cellsfusiono ciliated pseudostratified columnar epithelium; functions are mainly secretion and absorbtion simple squamous epithelium; functions as diffusion and filtration secretion in serous membranes microvilli: the…

Words 1849 - Pages 8

Lab 05 W2014 Revised Key Essay

3. Name the 3 parts of the pharynx. What kind of epithelium covers these parts? NASOPHARYNX: Pseudostratified OROPHARYNX: Stratified squamous HYPOPHARYNX: Stratified squamous 4. What organs make up the lower respiratory system LARYNX, TRACHEA, BRONCHI, LUNGS 5. What are the cartilage pieces that make up the larynx? single (thyroid, epiglottic, & cricoid) & three are paired (arytenoid, corniculate, cuneiform) 6. What kinds of epithelium would you find on superior & inferior surfaces of the…

Words 696 - Pages 3

Online assignment #2 Essay

EXAM 2 Question 1 * The name (not value) for a measured electrical charge difference between the inside and the outside of a resting cell's plasma membrane.


 membrane potential Question 2 * This principle, which determines the direction of diffusion for charged solutes, combines the concentration and electrical charge gradients acting on a solute:


 Electrochemical gradient Question 3 * If only potassium leakage determined membrane potential, what value would membrane potential…

Words 1061 - Pages 5

Epithelium and Mcgraw-hill Companies Essay

waste removal 5-8 Epithelial Tissue • Basement membrane—layer between an epithelium and the underlying connective tissue – Collagen • Anchors the epithelium to the connective tissue below it • Basal surface—surface of an epithelial cell that faces the basement membrane • Apical surface—surface of an epithelial cell that faces away from the basement membrane 5-9 Epithelial Tissue • • Stratified epithelium Simple epithelium – Contains one layer of cells – Named by shape of cells – All cells touch…

Words 4890 - Pages 20

Essay about Tissues: Tissues and Tissue General Characteristics

cells. ( * We won't distinguish glandular epithelium because it is of the cuboidal or columnar type.) A. SIMPLE SQUAMOUS - single layer (simple) of very thin, flattened cells (squamous). Function: diffusion and filtration. Found in air sacs of lungs, walls of capillaries. B. SIMPLE CUBOIDAL - single layer, cube-shaped cells. Function: Secretion and absorption. Found: Lining of kidney tubules, ducts of glands, covering surface of ovaries C. SIMPLE COLUMNAR - single layer, elongated cells with their…

Words 676 - Pages 3

Saladin 5e Extended Outline

environment or to an internal space. (p. 154–155) 1. Epithelium covers the body surface, lines body cavities, forms the external and internal linings of many organs, and constitutes most gland tissue. 2. Epithelium almost always lies on a layer of loose connective tissue and is dependent on this tissue’s blood supply for nutrients and waste removal. 3. The basement membrane anchors an epithelium to the underlying connective tissue. 4. Epithelia are…

Words 4599 - Pages 19