What is the composition of the cell wall? What is the relatively thin and flexible wall secreted first by a plant cell? What is the middle lamella? Where is it found? What material is it made of? Explain the deposition of a secondary cell wall. Animal cells do not have cell walls, but they do have an extracellular matrix (ECM).List some elements of the ECM. What are the intercellular junctions between cells? What can pass through them? Animals do not have plasmodesmata. Summarize the role of the three types of intercellular junctions seen in animal cells.
What is the composition of the cell wall? What is the relatively thin and flexible wall secreted first by a plant cell? What is the middle lamella? Where is it found? What material is it made of? Explain the deposition of a secondary cell wall. Animal cells do not have cell walls, but they do have an extracellular matrix (ECM).List some elements of the ECM. What are the intercellular junctions between cells? What can pass through them? Animals do not have plasmodesmata. Summarize the role of the three types of intercellular junctions seen in animal cells.
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