Exam 3: Compartmentation: Cells and Tissues

Structures composed of epithelial cells that produce secretions are called ________.

Sketch a short series of simple columnar epithelial cells.Label each of the three different borders.Briefly explain the different kinds of activities that may go on at each border,and tell how their structures and junctions support these functions.

For each question,select the corresponding category: -mitochondrion

Match the type of cell junction with the best description.Answers may be used once,more than once,or not at all -contributes to the blood-brain barrier

The thickest protein fibers from the following group are

Close examination of an organ reveals a lining of several layers of cells.The layers do not contain any blood vessels,and one surface of the cells faces the internal cavity of the organ.This tissue is probably

Match the type of cell junction with the best description.Answers may be used once,more than once,or not at all -their loss is characteristic of cancer

On the row of cells indicated below,match A-E to the terms in the following question(s). Figure 3.1 -plasma membrane

The five functional types of epithelia are listed below. Match each type with its location and/or description. -These thin,flattened cells allow the rapid passage of O₂ and CO₂ through the cells of the lungs and of certain blood vessels.

Nutrients undergo the last stages of digestion by enzymes located on the cells of the small intestine; then the nutrients are absorbed by these same cells by way of various membrane transport processes.Adipose cells absorb and store excess food energy in the form of fat.You and the other students in the physiology lab you are taking are doing an analysis of cell membrane composition,on unknown animal tissue samples labeled A and B.All lab groups determined that sample A contained,on average,81% protein,18% lipid,and 1% carbohydrate.Sample B contained 85% lipid,10% protein,and 5% carbohydrate.Sketch a graph of the class data.You now have to make a logical conclusion as to which sample is more likely to be intestine and which is adipose tissue.What do you conclude,and why?

The lumen of a hollow organ such as the stomach is considered to be part of the ________ environment.

Functions of epithelia include all of the following EXCEPT

Chondrocytes are to cartilage as osteocytes are to

Only totipotent stem cells are capable of producing new cells in an adult.

If an animal cell lacked centrioles,it would not be able to

Stem cell research has become a political topic in the last few decades.Explain why the research is being done,why some cells are favored for this research over others,and what the factors are that cause some people not to support this type of research.Are any alternatives available that are less opposed?

Describe the anatomical and fluid compartments of the body.How do the lumens of hollow organs fit into these classifications? Which fluid-containing cavities are considered to be internal and which are external? Of those that are external,why are they external (give examples)? You may wish to design a flow chart to help answer this.

On the row of cells indicated below,match A-E to the terms in the following question(s). Figure 3.1 -basolateral membrane

The distinguishing characteristic of connective tissue is

Intermediate filaments