1. Leaving Certificate Biology Homeostasis EQ iQuiz SECOND Press the F5 Key to Begin, Then click on this Blue Box FIRST In PowerPoint 2007 if you see a Security Warning click HERE on Options… and then click on  Enable this content

2. Homeostasis means maintaining a constant … Body shapeBody mass External environment Internal environment

3. Which of the following is involved in homeostasis? BrainBones BladderBronchi

4. Which of the following animals is an endotherm? SalmonSeal SnakeSpider

5. Which of the following may result in a drop in water content of the blood? SleepingExercise A cold dayDrinking

6. The body temperature of an ectotherm varies with it’s … Food intakeFluid intake Internal temperature External temperature

7. At which temperature do human enzymes work best? 35 °C36 °C 37 °C38 °C

8. In cold conditions the blood capillaries in the skin … Move up near surface Constrict DilateNone of these

9. Which of the following controls the water content of the blood? ADHADP FSHHGH

10. Leaves of plants are well adapted for rapid gas exchange because they are … NarrowThin ThickGreen

11. Which homeostatic organ controls the pH of the blood? HeartSkin KidneyLung

12. Which of the following is not a means by which the body retains heat? Adipose tissueHairs stand up Blood capillaries constrict Sweat is released

13. ADH acts on which of the following parts of the nephron? Proximal tubule & collecting Duct Proximal tubule & Loop of Henle Distal tubule & collecting Duct Distal tubule & Loop of Henle

14. The concentration in the blood of which of the following gases, controls breathing? OxygenCarbon dioxide Carbon monoxideAll of these

15. What is the main source of heat that keeps the body at a constant temperature? ExerciseMetabolism EatingBreathing

16. Name the main hormone involved when internal body temperature drops. OxytocinInsulin TestosteroneThyroxine

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