Exam 3: Compartmentation: Cells and Tissues

This type of epithelia is composed of thin, flattened cells that allow the rapid passage of O₂ and CO₂ in and out of the lungs and of certain blood vessels.

The most common types of cancer in America include colon cancer, skin cancer, breast cancer, cervical cancer, and prostate cancer.What do all of these cancers have in common and why are they so prevalent in our society?

In typical women of reproductive age, the epithelial cells lining the uterus (the endometrium)die and are shed from the body roughly once every month, in the process of menstruation.The triggers in this process include chemical (hormonal)changes and contraction of the blood vessels in the lining.Cell death may be a result of either apoptosis or necrosis.Give the characteristics of each process.Devise an argument for classifying the process of menstruation as an example of apoptosis, and then argue for classifying it as necrosis.Which is correct?

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

A.Define stem cells and differentiation, and describe the different types and the extent to which they are present during the life of an individual (include the fertilized egg as well as the adult that eventually results). B.Which of the four tissue types contain populations of stem cells of known function, and what is that function? Which types of tissue have stem cells of unknown function? Do any types of tissue lack stem cells? C.How do fully differentiated cells differ from stem cells? How can stem cells be used in medical treatment? Give examples.

An immunoliposome is a liposome that

The number of mitochondria in skeletal muscle cells is ________ adipose (fat)cells.

The simple squamous epithelial lining of blood vessels is 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.

Communication between the nucleus and cytosol occurs through

________ proteins extend all the way across the cell membrane.

Chondrocytes are to cartilage as osteocytes are to

________ is the extracellular component of connective tissues.

In a pancreatic cell producing digestive enzyme, you would expect to find an elaborate

The loss of these junctions are a characteristic of cancer.

Disappearance of which type of junction most likely contributes to the metastasis of cancer cells throughout the body?

This junction contributes to the blood-brain barrier.

This is the digestive system of a cell, degrading and/or recycling bacterial or organic components.

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

Which of the following terms is NOT used to define the structure that separates the contents of a human cell from its surrounding medium?