Which chronic complication of diabetes mellitus is characterized by the thickening and narrowing of small blood vessels, leading to impaired blood flow to the lower extremities?

Insulin is a hormone produced by the pancreas that plays a crucial role in regulating blood glucose levels. It facilitates glucose uptake into cells, promotes glycogen synthesis in the liver and muscles, and inhibits hepatic glucose production.

Incorrect choices:

a. This choice is incorrect. Glucagon is another pancreatic hormone that increases blood glucose levels by promoting glycogen breakdown and glucose release from the liver.

c. This choice is incorrect. Epinephrine is a hormone produced by the adrenal glands that can raise blood glucose levels during times of stress.

d. This choice is incorrect. Cortisol, also produced by the adrenal glands, can increase blood glucose levels in response to stress and inflammation.

Diabetic cataracts result from the accumulation of glucose within the lens of the eye, leading to changes in vision and the development of cataracts. This can cause blurred vision and visual disturbances.

Incorrect choices:

a. This choice is incorrect. Diabetic retinopathy is a complication that affects the blood vessels of the retina and can lead to vision loss.

b. This choice is incorrect. Diabetic neuropathy refers to nerve damage due to diabetes and can cause symptoms such as tingling, pain, and loss of sensation in the extremities.

c. This choice is incorrect. Diabetic ketoacidosis (DKA) is an acute complication characterized by high blood glucose levels, ketosis, and metabolic acidosis.