Looking at the diagrams, I can see they illustrate different types of transport across cell membranes:
- Diagram A: Shows carbon dioxide moving from high concentration outside to low concentration inside the cell (simple diffusion)
- Diagram B: Shows water molecules moving from an area with 0 glucose molecules to an area with 2 glucose molecules (osmosis)
- Diagram C: Shows glucose molecules moving from low concentration (5 molecules) to high concentration (25 molecules) - this appears to be active transport
Now I'll answer each question based on my knowledge of cell biology and the diagrams provided.
1.
What is osmosis?
Osmosis is the passive movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
2.
How does osmosis explain the fact that a watery syrup forms when you put sugar on strawberries?
When sugar is sprinkled on strawberries, it creates a high solute concentration outside the strawberry cells. Water from inside the strawberry cells moves out through osmosis to the area with higher solute concentration (the sugar), resulting in the watery syrup you observe.
3.
How are glucose molecules moved into a cell?
Glucose molecules are typically moved into cells through facilitated diffusion (using carrier proteins) or active transport (requiring energy), depending on the concentration gradient.
4.
What type of transport is this?
Based on diagram C showing glucose moving from low to high concentration, this would be active transport.
5.
After proteins are made by the ribosomes, how do they leave the cell?
Proteins leave the cell through exocytosis, where vesicles containing the proteins fuse with the plasma membrane and release their contents outside the cell.
6.
What is this process called?
This process is called exocytosis.
7.
What is a selectively permeable membrane?
A selectively permeable membrane (also called a semi-permeable membrane) is a biological membrane that allows certain substances to pass through while restricting others, based on factors like size, charge, or solubility. This property is essential for maintaining homeostasis in cells.
The worksheet appears to be teaching students about different types of cellular transport mechanisms including osmosis, diffusion, active transport, and exocytosis, using visual diagrams to illustrate these concepts.
Parent Tip: Review the logic above to help your child master the concept of transport in cells worksheet.
