Lecture Exam One - Tissues General

What is the study of tissues called?

histology

What are the types of tissues?

Epithelial

Connective

Nervous

Muscular

What is the function of the epithelial tissues?

protect, lubricate, secretion

In epithelial cells, the cells are arrange in

one or more layers

In epithelial cells, there is no _________

vascularization

Cells are highly joined and connected by ___________

intercellular junctional complexes

What are the types of junctional complexes that join epithelial cells?

tight junction

desmosome

gap junctions

hemidesmisomes

Tight Junctions:

prevents leakage

Desmosome:

has strong protein strands in between plaques

Gap Junctions:

has channel proteins

Hemidesmisomes:

membrane that attaches cells to connective tissues

Where are tight junctions commonly located?

intestines

Where are desmosomes commonly found?

skin

Where are gap junctions commonly found?

intercalculated discs

For epithelial cells, what are the common surface specializations

microvilli

cilia

How do epithelial tissues get nutrients?

the blood in the connective tissue below via diffusion

Intercellular junctions adhere

plasma membranes

Microvilli folds in the

plasma membrane

The microvilli is made up of _____ layer(s)

1

The microvilli increases _______

area for surface absorption

Where are microvilli commonly found?

small intestine

How does folding occur in microvilli?

folding in the wall of the intestine and folding within the epithelial cells

Cilia can act together to work like a ______

brush border

Cilia act to _____

keep stuff off tissues

Where are cilia mainly found?

respiratory tract

Cilia has cells to secrete ______ to catch impurities

mucous

Heavy smokers destroy their

cilia

Cilia is found in the _______ and helps to move the egg towards the uterus

female reproductive tract