Question

which organs and systems in the body can be impaired by persistently elevated blood sugar levels due to untreated diabetes?
respiratory system, digestive system, and bones
cardiovascular system, nervous system, kidneys, and eyes
muscular system, endocrine system, eyes, and immune system

Explanation:

In untreated diabetes, persistently high blood sugar damages blood vessels and nerves. The cardiovascular system (due to atherosclerosis, high blood pressure), nervous system (neuropathy), kidneys (diabetic nephropathy), and eyes (diabetic retinopathy) are commonly affected. The first option's organs/systems (respiratory, digestive, bones) are not primary targets. The third option's muscular system and endocrine system (other than the pancreas which is already affected in diabetes) are not the main impaired systems here.

Answer:

B. cardiovascular system, nervous system, kidneys, and eyes