Osmosis

Osmosis is the movement of water molecules from their region of higher concentration (dilute solution or with a lower solute concentration) to their region of lower concentration (concentrated solution or with a higher solute concentration) through a semi-permeable membrane.

• Meaning: Osmosis is the movement of water (solvent) through a semipermeable membrane from a dilute solution to a concentrated solution.
• Direction of Movement: Water moves from a hypotonic (low solute, high water) to a hypertonic (high solute, low water) solution.
• Types of Osmosis: Endosmosis: Water enters the cell and makes it turgid.
  Exosmosis: Water leaves the cell and makes it flaccid.
• Types of Solutions:
  Hypotonic: Cell swells.
  Hypertonic: Cell shrinks.
  Isotonic: No net movement of water.
• Cell Pressure: In a fully turgid cell, turgor pressure equals wall pressure, and DPD becomes zero.