Cells

Cells

Cells What are the functions of the cell organelles?

Structure dictates function in organelles How does the muscle cells having a lot of mitochondria help it perform its function?

Structure dictates function in organelles How does the neurons having long, narrow extensions (dendrites and axons) help it perform its function?

Structure dictates function in organelles How does red blood cells lacking many organelles but the cell membrane and cytoplasm help it perform its function?

Whats the difference between a prokaryotic cell and a eukaryotic cell?

Which 4 organelles are found in ALL cells (prokaryotic and eukaryotic)? A cell membrane is described as semipermeable. What does this mean?

Draw a phospholipid. Which part of it is polar? Nonpolar?

Polar Non-polar

Whats another word to describe a molecule that is polar? Whats another word to describe

a molecule that is nonpolar? Where are the hydrophilic heads and hydrophobic tails located in the phospholipid bilayer that makes up

the cell membrane? Why are they arranged this way? Which molecules can pass through the cell membrane freely? Why?

Is the cell membrane rigid or flexible?

Which molecules are blocked by the phospholipid bilayer? Why? If a molecule diffuses through the cell membrane, how is this

done? In other words, why doesnt it require energy? Which type of molecules can pass through the cell membrane this way? What type of molecules are passing through the cell

membrane via osmosis? Does this process require energy or the help of cell membrane proteins? Outside Cell

Inside Cell 6% glucose 1% glucose

1. What would be the net movement of glucose? Why? 2. What would be the net movement of water? Why? 3. What type of solution is the cell placed in

hypotonic, hypertonic or isotonic? 4. What will be the overall effect on the cell? Outside Cell

Inside Cell 6% glucose 6% glucose

1. What would be the net movement of glucose? Why? 2. What would be the net movement of water? Why? 3. What type of solution is the cell placed in

hypotonic, hypertonic or isotonic? 4. What will be the overall effect on the cell? Outside Cell

Inside Cell 2% glucose 4% glucose

1. What would be the net movement of glucose? Why? 2. What would be the net movement of water? Why? 3. What type of solution is the cell placed in

hypotonic, hypertonic or isotonic? 4. What will be the overall effect on the cell? 1. Placing a plant cell in a

hypotonic solution will cause the plants turgor pressure to _______________. WHY?

2. Placing a plant cell in a hypertonic solution will cause the plants turgor pressure to _______________. WHY?

Which molecules pass through the cell membrane via ion channels (facilitated diffusion)? WHY? Is this a form of active or passive transport?

What molecules pass through the cell membrane via a carrier protein (facilitated diffusion)? Why?

How is active transport different than facilitated diffusion?

How is ATP used in active transport? Use the sodium-potassium pump to explain. Whats the difference between exocytosis and

endocytosis? What types of substances move into/out of the cell this way? What is the surface area to volume ratio for the

following image? Side length (mm) Surface area (mm2) Volume area (mm3)

3 54 9

Why is it important for cells to have a high surface area to volume ratio?

Why is water considered a polar molecule? Water is considered a universal

solvent. What does this mean? Why do you think the chemical properties of water are important to cellular systems?

________ is the force between water molecules and __________ is the force between water and nutrients

What is capillary action? How is this important for plants?

What is the function of the following organ systems Respiratory? Digestive? Circulatory?

Excretory? What is a negative feedback loop? Use an example to show how it helps maintain

homeostasis. What is a positive feedback loop? Use an example to show how it helps maintain

homeostasis

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