Final answer:
Hypoglycemia is characterized by low blood glucose levels and can cause symptoms such as shakiness, dizziness, and weakness.
Step-by-step explanation:
Hypoglycemia refers to low blood glucose levels, typically below 70 mg/dL. The symptoms of hypoglycemia can vary, but common signs include feeling shaky, dizzy, irritable, confused, or weak. Sweating, headache, hunger, blurred vision, and rapid heartbeat are also symptoms that may be experienced.