Process:  - Air is taken into the body via the nose or mouth - The air travels into the windpipe - The windpipe divides the air to the two lungs via the bronchial tubes - The lungs oxygenate the blood in the body - Carbon dioxide is filtered out by every cell in the body - The carbon dioxide is carried back to the lungs via the bloodstream - The carbon dioxide is exhaled.  Perturbation hypothesis: suppose more air travels to the windpipe happens, how will it affect MORE oxygen being brought to the body.  Does the supposed perturbation have an effect (direct or indirect) on the process?
Ans: yes

Process:  - The blood sugar drops in a body - Cells in the pancrease release glucagon - The liver in response turns the glucagon into glucose - And releases it into the blood - The blood sugar levels are restored.  Perturbation hypothesis: suppose cells release less glucogen happens, how will it affect LESS regulation of blood sugar level being needed.  Does the supposed perturbation have an effect (direct or indirect) on the process?
Ans: yes

Process:  - People dig up coal from the ground - People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain.  Perturbation hypothesis: suppose fewer people use electric heating happens, how will it affect MORE acid rain.  Does the supposed perturbation have an effect (direct or indirect) on the process?
Ans: yes

Process:  - Bacteria enter the body - Bacteria start to divide and grow - The uncontrolled growth takes away resources from other cells - Other cells cannot function properly - We feel unwell - The growth and division of bacteria produce toxins - Toxins harm the body - The body tries to react to the toxins - The body&#x27;s natural defenses can sometimes cause us to feel unwell.  Perturbation hypothesis: suppose frequent exposure to people who are sick happens, how will it affect less toxins are produced.  Does the supposed perturbation have an effect (direct or indirect) on the process?
