Biology Chapter 1: A Tour of the Cell (Part 4)

<p>Regulation of cell division (B)</p> Signup and view all the answers

<p>Secondary cell walls are thicker and more rigid. (D)</p> Signup and view all the answers

<p>Collagen (B)</p> Signup and view all the answers

<p>Plant cell walls are primarily composed of carbohydrates, while ECM is rich in proteins. (B)</p> Signup and view all the answers

<p>To regulate the movement of substances between cells (B)</p> Signup and view all the answers

<p>Integrins act as receptors for extracellular signals and relay these signals to the cytoskeleton. (D)</p> Signup and view all the answers

<p>Plasmodesmata are found only in plant cells and allow for the passage of larger molecules, including proteins and RNA. (D)</p> Signup and view all the answers

<p>Gap junctions (C)</p> Signup and view all the answers

<p>To provide strong adhesion between cells, anchoring them to the cytoskeleton. (D)</p> Signup and view all the answers

<p>By providing physical support and transmitting signals through integrins, which can affect gene expression. (A)</p> Signup and view all the answers

<p>They are abundant in the ECM of animals but not found in plants. (C)</p> Signup and view all the answers

<p>Creating a selectively permeable barrier between cells, controlling the passage of molecules. (C)</p> Signup and view all the answers

<p>Integrins bind directly to ECM proteins through their transmembrane domains and interact with the cytoskeleton through their cytoplasmic tails. (C)</p> Signup and view all the answers

An extracellular structure that protects and shapes plant cells.

Protects plant cells, maintains shape, prevents excessive water uptake.

The initial thin and flexible wall secreted by young plant cells.

A thin layer rich in pectins that glues adjacent plant cells together.

A thicker wall formed between the plasma membrane and primary wall in mature cells.

Channels that perforate plant cell walls, allowing communication between adjacent cells.

A network outside animal cells mainly composed of glycoproteins and carbohydrate molecules.

A key glycoprotein in ECM that forms strong fibers outside of animal cells.

A molecule consisting of a core protein with carbohydrate chains, often 95% carbohydrate.

Proteins like fibronectin that help cells attach to the extracellular matrix.

Cell-surface receptors that connect ECM to the cytoskeleton and transmit signals.

A network inside the cell that supports its shape and organization.

Cell junctions where adjacent membranes are pressed together to prevent leakage.

Anchoring junctions that attach adjacent cells together using intermediate filaments.

Communicating junctions that allow small molecules to pass between adjacent cells.