4. Tissues & Histology

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Keratinocytes begin life in the stratum corneum and gradually are pushed into the stratum basale.

Imagine that a disease turns the simple epithelia of the lungs, kidney tubules, and intestines into keratinized stratified squamous epithelia. What effect would this change in form have on the functions of these tissues?

Describe the roles of the following components of the ECM:

Glycoproteins (cell-adhesion molecules)

In which of the following tissue types might you expect to find goblet cells?

a. Simple cuboidal

b. Simple columnar

c. Simple squamous

d. Stratified squamous

e. Transitional

Which epithelium is 'built' to withstand friction?

a. Simple squamous

b. Stratified squamous

c. Simple cuboidal

d. Simple columnar

e. Pseudostratified

Describe the general characteristics of epithelial tissue. List the most important functions of epithelial tissues, and give examples of each.

Identify the six types of epithelial tissue shown in the drawing below.

a. __

Identify the six types of epithelial tissue shown in the drawing below.

b. ___

Identify the six types of epithelial tissue shown in the drawing below.

d. ___

Identify the six types of epithelial tissue shown in the drawing below.

e. ___

Identify the six types of epithelial tissue shown in the drawing below.

f. ___

Which of the following epithelia most easily permits diffusion?

(a) Stratified squamous

(b) Simple squamous

(c) Transitional

(d) Simple columnar

What are the four essential functions of epithelial tissue?

In adults, over 90% of all cancers arise in epithelium. Such cancers are called carcinomas, or adenomas (adenocarcinomas) if they arise in glandular epithelia. In fact, cancers of the skin, lung, colon, breast, and prostate are all in these categories. Why do you think this is so?

In adults, over 90% of all cancers are either adenomas (adenocarcinomas) or carcinomas. In fact, cancers of the skin, lung, colon, breast, and prostate are all in these categories. Which one of the four basic tissue types gives rise to most cancers? Why do you think this is so?