Ch.5 Tissues-Living Communities (Vet Tech A&P)

Chapter 5 Exam Multiple Choice

Tissues

cells of similar type and function clustered into layers, sheets, or groups

What are the four primary types of tissue?

Epithelial, Connective, Muscle, Nervous

What is the special purpose of epithelial tissue?

covers and lines

What is the special purpose of connective tissue?

provides support

What is the special purpose of muscle tissue?

enables movement

What is the special purpose of nervous tissue?

controls work

Epithelial Tissue

Composed of sheets of cells that cover and line other tissues; also known as Epithelia

Where is Epithelial Tissue found?

bladder, mouth, blood vessels, thorax, cavities and ducts of the body

What are the functions of the Epithelial Tissue?

It covers and lines, filters substances, absorbs nutrients, provides sensory input, manufactures secretions, manufactures excretions

What are the classifications of Epithelial Tissue?

shape of cells, number of layers, presence of surface specialization

What is the shape of cells in Epithelial tissue?

Cuboidal, Squamous, Columnar

What is the number of layers in Epithelial Tissue?

Simple, stratified, psuedostratified

Epithelia

Epithelial Tissue

What is Gross Anatomy?

The study of anatomical structure that can be seen with the naked eye such as bones and muscles; also known as macroscopic anatomy

What is microscopic anatomy?

Study of anatomical structure that can be seen with a microscope such as tissues and organs; also known as histology

Glandular epithelia

Epithelia that engage in the manufacture and release of substances

Excretions

substances that leave the body (sweat,urine,feces)

Secretions

Substances that remain in the body (regulatory molecules and mucus)

What are the characteristics of Epithelia?

1) Epithelial cells are polar (have apical and basal surfaces)

2) Have lateral surfaces connected to neighboring cells by junctional complexes

3) All epithelial cells lack blood vessels or capillaries (avascular)

4) Most epithelial cells are innervated and provide sensory input

Junctional complexes

plasma membrane of epithelial cells that are joined to form specialized attachments

What are the three major types of cellular junction?

Tight junctions, desmosomes, gap junctions

Tight Junction

Formed by fusion of the othermost layers of the plasma membrane of adjourning cells

Where can tight junctions be found?

Tissues in where there can be no leaks, Urinary bladder or digestive tract

Desmosome

Strong welded plaque or thickening which connects the plasma membranes of adjacent cells. Echini al coupling formed by filaments that interlock with one another