Final answer:
The stages of anesthesia match with definitions as follows: Stage 1 with 'Loss of consciousness', Stage 2 with 'Excitation phase', Stage 3 with 'Surgical anesthesia', and Stage 4 with 'Cardiovascular and respiratory collapse'.
Step-by-step explanation:
The stages of anesthesia and their corresponding definitions are matched as follows:
- Stage 1 (C) Loss of consciousness
- Stage 2 (A) Excitation phase
- Stage 3 (D) Surgical anesthesia
- Stage 4 (B) Cardiovascular and respiratory collapse
General anesthetics are used in medical practice to create a state of general anesthesia which involves immobility, analgesia, amnesia, unconsciousness, and reduced autonomic responsiveness to noxious stimuli. These effects of anesthetics are crucial for the preparation and execution of surgery and emphasize the importance of carefully monitoring the stages of anesthesia.