Topic 1 - Transport In And Out Of Cells Flashcards
What is the primary function of transport in and out of cells?
To support life processes by moving substances like oxygen, glucose, and waste products
Essential for maintaining cellular functions and homeostasis.
What is diffusion?
A form of passive transport that does not require energy, moving molecules from high concentration to low concentration
Molecules move in all directions but net movement is towards lower concentration.
What is osmosis?
A form of passive transport specific to water, moving from a dilute solution to a more concentrated solution
Movement occurs across a selectively permeable membrane.
How can osmosis be conceptualized in terms of solute concentration?
Movement of water occurs from an area of high solute concentration to lower solute concentration
Example: Water moves from a ‘salty’ solution to a less ‘salty’ solution.
What is active transport?
A form of transport that requires energy to move molecules against a concentration gradient
Energy is derived from ATP produced during respiration.
What type of transport moves molecules from low concentration to high concentration?
Active transport
Requires energy input to function.
True or False: Diffusion requires energy to occur.
False
Diffusion is a passive process.
Fill in the blank: Osmosis is a form of _______ transport that applies only to water.
passive
It does not require energy.
