Biology I: Chapter 4 (): McGraw Hill

Tight junctions are unique to which of the following?
Fish
Invertebrates
Humans
Vertebrates

vertebrates

The function of cell surface proteins is to give cells their _________________________ by marking the surface of the cell so it can be identified as being of a particular type. In multicellular orgnanisms this allows the recognition of self versus foreign.

identity

Gap junctions

involves connexon proteins that create a pore to connect cells

Plasmodesmata

cytoplasmic connections between the cell walls of plants

Tight junctions

leak-proof seal that surrounds the cell

Adherens junctions

cadherins bind to microfilaments

Desmosomes

cadherins bind to intermediate filaments

Which of the following ions can cause opening and closing in gap junction channels?

H+ and Ca2+

MHC proteins are involved in the recognition of self and non-self by the _____________ system.

immune

Which type of junctions are lined with plamsa membrane and contain a central tubule that connects the endoplasmic reticulum of two cells?

plasmodesmata

________________ junctions (contain proteins called Claudins) between neighboring cells of the lining of the human digestive tract are very secure and prevent leakage.

tight

Cells that are part of the same tissue type recognize each other based on ____________________.

cell-surface markers

Examples of items that should be to cross gap junctions include:
ions
amino acids
proteins
glucose

* ions
* amino acids
* glucose

Which of the following junction types is only found in plants?

plasmodesmata

Desmosomes interact with:

intermediate filaments

_________________ are specialized openings in the cell walls of plant walls where the cytoplasm of adjacent cells is connected for communication.

plasmodesmata

The primary function of ___________ junctions is to connect the plasma membranes of adjacent cells in a sheet.

tight

Communicating junctions in plant cells are called ________________.

plasmodesmata

The functioning of a tissue is dependent upon which of the following?

the arrangement of cells in the tissue

______________ junctions attach the cytoskeleton of one cell to the extracellular matrix or the cytoskeleton of another cell. These junctions can contain proteins such as cadherins,

adhesive

The majority of tissue-specific cell-surface markers are _________________.

glycolipids

__________ are cadherin-based junctions found only in vertebrates; they join adjacent cells and support tissues against mechanical stress.

desmosomes

Communicating junctions in animal cells are called ________________ junctions.

gap

Which molecules, serving as surface markers on red blood cells, determine the ABO blood type?

glyolipids