Lesson 3-4 Flashcards
What is passive transport and give examples?
A mechanism of transport across the membrane without using energy, diffusion, osmosis and facilitated transport
What is active transport?
Transport across the membrane requiring energy stored from the atp
What is diffusion?
The movement of particles from an area of high concentration to an team of low concentration
What factors can affect the rate of diffusion?
Temperature, Particle size, concentration gradient and density of the medium
What is osmosis
The movement of water across the membrane
What happens during osmosis?
Water moves from an area of high water concentration to an area of low concentration
What is solute?
Particles which are dissolved in water
What is a solvent?
A liquid which dissolves the solute
What is osmotic pressure?
The pressure due to the flow of water from the area of greater concentration to the area of lesser concentration
What is a isotonic solution?
A solution that has the same solute concentration as another solution
What is a hypertonic solution
A solution that has a higher solute concentration than another
What is a hypotonic solution?
A solution that has a lower solute concentration than another solution
What is endocytosis?
The movement of large particles to the inside of the cell membrane through the formation of a vesicle
What is pinocytosis?
Used by the cells to engulf medium sized particles by folding the membrane and drawing the particle in
What is phagocytosis?
Used by a cell to engulf very large particles by extending around and enclosing it in (like a hug)
What is exocytosis?
The movement of large particles to the outside of the cell by fusing a secretory vesicle with the cell membrane through
