1. How does the structure of the cytoskeleton contribute to its function? It supports the cell and maintains its shape. • It controls the positions and movements of organelles within the cell. • It is involved with bulk movements of the cytoplasm, called cytoplasmic streaming. • It interacts with extracellular structures, helping to anchor the cell in place. Microfilaments Made up of strands of the protein actin; often interact with strands of other proteins. Intermediate filaments Made up of fibrous proteins organized into tough, ropelike assemblages that stabilize a cell’s structure and help maintain its shape. Microtubules Long, hollow cylinders made up of many molecules of the protein tubulin. Tubulin consists of two subunits, α-tubulin and β-tubulin.
2. Explain the role of an inhibitor for scientists looking to determine if Amoeboid cell movements are caused by cytoskeleton.
In test tubes, the drug cytochalasin B prevents microfilament formation from monomeric precursors. This led to the question:

Things you should make sure you understand: (feel free to ask questions about them in class) · The structure and function of cillia and flagella. · The structure and functions of the three major components of the cytoskeleton (microfilaments, microtubules, and intermediate filaments). · The structure and function of the cell wall. · The structure and function of the extracellular matrix.
The differences in structure and function among the types of intercellular junctions found in cells (tight junctions, gap junctions, desmosomes, and plasmodesmata)

Pp 89-92 NORTON TEXT Ethnic and religious diversity in colonial period

The Colonial Period Longest period in AH 1606