Final answer:
Without adequate perfusion, the kidneys can be damaged, leading to a decline in kidney function and potential kidney failure.
Step-by-step explanation:
Without adequate perfusion, the kidneys can be damaged. Insufficient perfusion means that the kidneys are not receiving enough blood flow to carry out their functions effectively. As a result, waste substances can build up in the blood, leading to a decline in kidney function. This can cause various symptoms like weakness, lethargy, shortness of breath, anemia, swelling, and imbalances in electrolytes like potassium. In severe cases, kidney failure may occur.