Chapter 19 ECM and junctions

4 major families of tissues (tissue= group of similar cells)

4 major class Cell Junctions

A plasmodesmata cell junction found in _____ cells and this is an example of a _____ junction

a Occluding Junction is a
A) desmosome
B) adherens junction
C) hemidesmosome
D) a and b
E) tight junction

another name for a cell-matrix junction

The transmembrane adhesion proteins in anchoring junctions

The 2 major families of CAM's

This anchoring protein connects IF's to ECM proteins to form hemidesmosomes

this anchoring protein forms desmosomes

true/false

cadherins AND integrins are independant on Ca 2+ ions
True False

__________ connects IF's of neighboring cells to provide mechanical strength. The protein involved is called_________

A selectin is part of the _____ family. It also is dependant on ___

The only CAM protein that does not require Ca2+ in order to function

Immunoglobulin superfamily examples:
A) neural cell adhesion molecule
B) intercellular cell adhesion molecule
C) desmosome
D) c and d
E) adherens junction

The blood-brain barrier is an example of this type of junction

a ______ ______ is formed by a band of branching sealing strands that encircle the apical region of each cell

sealing strands in a tight junction are composed of transmembrane proteins called

what is a Junctional complex

3 examples of what might be found in a junctional complex and the proteins seen in that type of junction

This type of junction permits the movement of ions and small molecules between cytosol of neighbouring cells

a gap junction is found only in ____ cells and channels between cells are connected though ______

T/F: Gap junctions link skeletal muscle and nervous tissue

The only cells junctions in a plant cell are?

This specialized layer of ECM that helps bind cells to the ECM

Not an example of ECM
A) fibronectin
B) perlecan
C) laminin
D) none of these
E) decorin

this type of CAM attaches a cells cytoskelton filaments to the basal lamina

define laminin.

2 major families of molecules that are secreted by the cells in the matrix

GAGs - can be covelently linked to proteins to form _________

ground substance is composed of?

an ECM family that consists of a repeating disaccharide repeated dozens of times

define: proteoglycan

Collagen is an example of ECM and belongs to which family

this ECM provides strength to a tissue and is the MOST abundant protein in mammals

this fibrous protein (ECM) provides elasticity to a tissue as well as flexability

T/F: some fibrous proteins have an adhesive role
True False

The structural and adhesive molecules in PLANT cells