Chapters 22 & 23

Maintaining a Water Balance in Animals & Plants

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1. Freshwater bony fish constantly water by osmosis from the surrounding water.

2. Their kidneys possess many glomeruli which allow a filtration rate of blood resulting in the loss of much water in urine.

3. The secretory cells actively salts from external water.

4. Saltwater bony fish constantly water by osmosis to the surrounding water.

5. They drink sea water and have kidneys with few glomeruli which allow a water to be lost in urine.

6. Their chloride cells actively excess salt out into the sea.

7. Migratory fish are adapted to cope with changes in concentration of the external environment by being able to alter their method of as required.

8. Desert mammals show and adaptations which enable them to water.

9. The continuous passage of water and nutrient ions up through a plant is called the transpiration . It is the means by which cells are supplied with and water needed for biochemical reactions.

10. The force with which water is pushed up a stem by the roots is called root .

11. is the loss of water by evaporation. It occurs mainly through in leaves.

12. This loss of water sets up a transpiration which draws columns of water molecules up through the xylem vessels. This is explained in terms of the theory.

13. Changes in of guard cells bring about opening and closing of stomata.

14. Transpiration rate is affected by several different factors.

15. are plants adapted to survive in dry or habitats.

16. are plants adapted to survive completely or partially in water.