Exam 17: Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

Discuss the role of claudins in the structure of tight junctions.Propose what would happen to a tight junction if the extracellular loop were comprised of nonpolar amino acids.

A collection of collagen fibrils is a collagen ________.

The three most common glycosaminoglycans (GAGs)are ________,________,and ________.

The plant cell wall network is comprised of all of the following except

Cancer cells metastasize due to a variety of interactions with cell adhesions,cell junctions,and the extracellular matrix.Explain how cancer cells metastasize by three different mechanisms via cellular adhesion,cell junctions,and the extracellular matrix.

In animal cells,adhesive glycoproteins such as ________ and ________ attach cells to the matrix.

Cadherins are associated with ________ junctions.

In performing research,you treat frog zygotes with antibodies that bind E-cadherin.As a result,you expect

A genetic screening by amniocentesis reveals a defective L1-CAM gene.Based on this information,what defects do you expect,and why?

Which of the following is mismatched with regard to similar excellular structures in plant and animal cells?

________ are the adhesive glycoproteins associated with most animal cells that function in calcium-mediated cell-cell recognition and adhesion.

One of the most important roles of proteoglycans is to trap ________.

Which of the following is the correct order for the synthesis of the plant cell wall,from the outermost layer to the innermost layer?

Some observations have suggested to researchers that substances associated with the extracellular matrix may be involved in cell migration.This has been observed with the cell marker CD44 on the surface of cancer cells and their ability to be separate from one another and to easily metastasize to other regions of the body.This is most likely due to the interaction of CD44 and

The type of cellular junction prominent in the stomach and kidney is the

The ________ serves as structural support,in tissue organization,and as a permeability barrier.

________ is the name given to the layer of cell wall material shared between two adjacent plant cells.

You are investigating cell localization by targeting the carbohydrates associated with various cell types.Based on this molecule's ability to bind various carbohydrates,which of the following would help determine which carbohydrates are found on the cell surface?

Which of the following cell junctions are associated with the proper alignment of intestinal epithelial cells?