Download Cellular Processes

Cellular Processes
Getting materials in and out of cells
• Food needs to get into the cell, wastes need
to get out, and water is constantly moving
back and forth.
• Substances that can easily pass through the
semi-permeable cell membrane do so by
passive transport
Diffusion: the movement of
molecules from an area of
high concentration to an
area of low concentration
Osmosis: the diffusion of water
across a cell membrane
When either the molecules are too big or there’s a
higher concentration inside the cell, substances move
by active transport; energy is required to move the
molecule through a carrier protein
Cellular Respiration
During respiration, cells break down sugar (glucose) to get energy
(ATP). This energy enables the cell to perform all of its life
processes.
Where does respiration occur?
In the mitochondria of all cells
Cellular Reproduction
A cell continues growing
until it is mature and ready
to reproduce. Cells
reproduce asexually by
cellular division (the cell
splits in half).
During mitosis, the cell
makes a copy of its DNA so
each new cell will have an
exact set of directions for
how to live