Week 11 exam notes
__2__ cells shrink 1 isotonic
__3__ cells swell .
__4__ intracellular fluid . hypertonic
__1__ cells do not change
__5__ H O m2ves to high solute area . hypotonic
We know the arctic has not always been a harsh, cold place because.............. brachiopod
fossils are abundant - a group that is now relatively rare but once were prevalent in
Ice crystals may not damage cell membranes if there is controlled ice formation that
occurs only in the extracellular fluid.
Both freeze-intolerant and freeze-tolerant animals may produce glycerol and/or other
sugars in their cells.
Antifreeze proteins bind to ice crystals and lower the freezing point of body fluids,
preventing ice crystal formation
One example of how the external environment impacts an organism differently
depending on the developmental stage is....
Crustaceans in Arctic ponds produce eggs that remain dormant and then hatch in warmer
conditions in the spring, while adults do not survive.
Matching the overwintering strategy with the appropriate animal.
__1__ Wood frog 1
. Freeze Tolerant
__2__ Temperate ant
__2__ Arctic vole 2 Freeze Intolerant
__2__ Winter flounder