LAB 5 Cellular Respiration http www phschool comsciencebiologyplacelabbenchlab

LAB 5 Cellular Respiration http: //www. phschool. com/science/biology_place/labbench/lab 5/process. html

C 6 H 12 O 6 + 6 O 2 → 6 H 2 O + 6 CO 2 • KOH turns CO 2 gas into a solid • So changes in volume will be due to ? http: //www. phschool. com/science/biology_place/labbench/lab 5/respwork. html

CONTROL • If you want to control variables the contents of the vials must start the SAME • How can you measure the volume of an irregularly shaped object, like peas?

Make another set 1, 2, 3 will go in room temp; 4, 5, 6 will go in 10° water http: //www. phschool. com/science/biology_place/labbench/lab 5/assemble. html

• Place respirometers in water bath with tips of pipettes resting on a masking tape sling above the water level. • Wait 7 MINUTES for temperature to equilibrate. • Add a drop of RED FOOD COLOR into the tip of each pipette http: //www. phschool. com/science/biology_place/labbench/lab 5/measure. html

• • • Lower the pipettes into water Quickly align the tubes so you can read the numbers Wait 3 MINUTES Record level of water in each pipette and start timer Take readings from each respirometer at 5 minute intervals for 20 minutes • REPEAT with 2 nd set of respirometers in ice water http: //www. phschool. com/science/biology_place/labbench/lab 5/measure. html

http: //www. phschool. com/science/biology_place/labbench/lab 5/quiz. html

HOW DOES TEMPERATURE AFFECT THE RESPIRATION RATE IN AN ORGANISM? Cold blooded (Ectothermic) http: //www. lbreptileexperience. com/adventures. html Warm blooded (Endothermic) http: //www. uselessgraphics. com/rats. htm