Homeostasis & Adaptations

Homeostasis When a cell has balance levels – constant environment in order to survive and reproduce Osmosis Water balance Isotonic solutions allow for a cell to be at homeostasis Temperature Normal human temperature = 98.6°F How do we maintain that normal base temperature?

Homeostasis Eat food! Blood Glucose Level NEGATIVE FEEDBACK CONTROL Low blood sugar How would to get to a higher, optimal level? Eat food! More glucose being spread through the bloodstream High blood sugar How would to get to a lower, optimal level? Release insulin that breaks down glucose NEGATIVE FEEDBACK CONTROL

Unicellular Organisms Prokaryotes Lack organelles Single-celled Flagella- movement Growth Specific environments Rapid reproduction

Adaptations Extremophiles Thermophiles Bacteria and archaea that can survive in the extreme environments where other life forms cannot Thermophiles Bacteria that thrive in high heat environments (above 113ºF) Thermophiles have more G/C pairs in their DNA than non- thermophiles do Keeps their DNA, proteins and membranes from melting