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AP/DE Biology
GR Cell Structures, Transport, & Communication
Ch 4 and Ch 5
Name ________________
Block _____ Date _____
1) Explain why cell size is limited.
2) Explain why compartmentalization is important in eukaryotic cells and give two
examples.
3) What is the endomembrane system? List the interconnected structures and explain
how they work together within a cell.
4) Explain the difference between microtubules, microfilaments, and intermediate
filaments that compose the cytoskeleton. Give an example of how each type of fiber
is used in organisms.
5) Describe the structures of intercellular junctions found in plant and animal cells and
relate those structures to their functions.
6) Describe the composition of a cell membrane: include the properties and
arrangement of phospholipids, the purpose of cholesterol, the purpose of two types of
cell surface carbohydrates, and the location and function of transport proteins.
7) Describe the fluid properties of the cell membrane and explain how membrane
fluidity is influenced be membrane composition.
8) Define diffusion and explain what causes it. How is it important in the process of
digestion?
9) Define osmosis. Predict the direction of water movement into or out of a cell when
placed in a hypotonic solution. What would be the impact of increased salt intake on
urine output from the kidney and why? (Use what you know about osmosis).
10) Compare and contrast endocytosis, exocytosis, phagocytosis, pinocytosis, and
receptor-mediated endocytosis.
11) Explain the difference between local signaling involving autocrine signals and
paracrine signals and long distance signaling involving hormones.
12) Describe the three main stages of cell signaling.