Do you favour or oppose the use of animal organs (such as hearts or kidneys) as transplants in humans when human organs are not available? Explain.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

c is the correct answer!

regulate growth

produce insulin

control bladder

regulate bone calcium

control metabolism

produce adrenaline