Tonight's homework has 3 partss:
1. Complete CW 67 questions.
Answer all of the following questions to the best of your ability and in complete sentences in the space at the bottom of the page.
1. How could oxygen cross the cell membrane if the concentration of oxygen is lower inside the cell than it is outside the cell?
2. How are facilitated diffusion and active transport related to homeostasis?
3. How is facilitated diffusion different from active transport?
4. Some organisms that normally live in pond water contain water pumps. These pumps continually pump water out of the cell. Describe a situation that would reverse the action of the pump.
5. Farming and watering that is carried out in very dry regions of the world leaves salts that accumulate in the soil as water evaporates. Based on what you know about concentration gradients and transport, why does increasing salinity (or saltiness) of soil have negative effects on plant cells?
6. Summarize – Based on this week, how does cellular transport help maintain homeostasis within a cell?
2. Log in to Engrade and take the "Homeostasis Review" quiz. The quiz closes at 8:30 am on Friday.
3. Study for the quiz.
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