Homeostasis powerpoint
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Transcript of Homeostasis powerpoint
HOMEOSTASIS ANDDIFFUSION
CELLS AND THEIR ENVIRONMENT
LIFE’S BALANCING ACT
If you are too hot or too cold your body
temperature is out of balance
When we are too cold we
shiver, it warms us up
When we are too hot we
sweat, it cools us down.
Sweating and shivering are
the body’s response to
extreme temperature.
They help the body return to a
temperature that is comfortable. The body is balanced
CELL BALANCEYour body is made up of cells. And, just like your body, cells must stay balanced. They must have just the right amount of materials to maintain the proper environment for your body.
HOMEOSTASIS
The balance that all living things have to maintain, is called
HOMEOSTASIS.
INTRODUCING DIFFUSION
The things we eat and drink are made of small particles called molecules.
These particles are always moving around and bumping into each other.
They will move from areas that are crowded to areas that are less crowded until they spread out evenly.
The movement of particles in our cells, from areas that are crowded to areas that are less crowded, is called
DIFFUSION
crowded less crowded
Remember the cell? How many of these parts do you remember?
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nucleus
mitochondria
Cell membrane
cytoplasm
Diffusion happens in cells.
This is a cell membrane. Can you find the parts where particles might go in and out of the cell? Click to check your answer.
This is one of five channels in the diagram that move particles in and out
Think of the cell membrane like the doors of a school. Students go in and out only through the doors.
Students are like the particles in cell diffusion. They move from the crowded buses into the school through the doors. Once inside they spread out pretty evenly into their classrooms.