Question

what is osmosis? osmosis is a type of passive transport. this means that it happens without the cell using energy. in osmosis, water molecules move from an area where they are in high concentration to an area of low concentration. this movement continues until the concentration of water is balanced on both sides of a semipermeable membrane. real - life connection: why cant you drink ocean water? if youre lost at sea and drink ocean water, youll become more dehydrated. thats because the concentration outside your cells becomes higher than inside. water rushes out of your cells to balance the concentration, and your cells shrink. this is osmosis in action. this also models the cells response to changes in external conditions to maintain balance and system models as the cell responds to changes in external conditions to maintain balance. what is equilibrium? equilibrium is the state where the concentration of molecules is the same on both sides. in equilibrium, molecules like water still move, but they move equally in both directions. the system is balanced without any net change. this supports the crosscutting concept of conservation - as molecules move, the total amount stays the same. dok 1 - 2 questions: 1. what type of transport is osmosis? 2. does osmosis require energy from the cell? 3. what direction do molecules move during osmosis? 4. what does the word \equilibrium\ mean in this context? what is a semipermeable membrane? a semipermeable membrane is a barrier that allows some molecules to pass through. in cells, the semipermeable membrane is called the cell membrane. it helps the cell control what enters and leaves. during osmosis, water molecules pass through the membrane freely, but larger molecules may need help to pass through. osmosis is a good example of form and function - the form (the membrane with its pores) allows only certain substances to pass, contributing to the function of maintaining the cells internal environment.

Explanation:

1. Osmosis is a type of passive transport as stated in the text.
2. Since it is passive transport, it does not require energy from the cell.
3. Water molecules move from an area of high concentration to an area of low concentration during osmosis.
4. Equilibrium means the state where the concentration of molecules is the same on both sides, and molecules move equally in both directions with no net change.

Answer:

1. Passive transport
2. No
3. From an area of high concentration to an area of low concentration
4. The state where the concentration of molecules is the same on both sides, and molecules move equally in both directions with no net change.