Problem: - The lungs expand - Air is pulled from outside the body, into the lungs - The membranes in the lungs collect oxygen molecules - Oxygen is transferred to red blood cells - Red blood cells distribute oxygen throughout the body - What might be the first step of the process?

A: The diaphragm contracts

Problem: - That bacteria begins to grow and reproduce inside the cells - The dividing bacteria begin to make toxins - Those toxins damage your cells - Disease symptoms may begin. What might be the first step of the process?

A: Someone is infected with bacteria

Problem: - 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. What might be the first step of the process?

A: The blood sugar drops in a body

Problem: - They process it with millions of tiny nephrons - Remove all the waste - The kidneys return the blood back to the body through the renal artery - Send the urine with the waste to the bladder through the ureters. What might be the first step of the process?

A:
The kidneys receive blood from the renal artery