Final answer:
An 81-year-old man who is pulseless and apneic would have a Glasgow Coma Scale (GCS) score of 3, indicating the lowest level of consciousness with no eye opening, verbal, or motor response.
Step-by-step explanation:
The Glasgow Coma Scale (GCS) is a clinical tool used to assess a person's level of consciousness after a head injury. It is based on three aspects of responsiveness: eye opening (E), verbal response (V), and motor response (M). The scale runs from 3, indicating deep unconsciousness, to 15, indicating clear consciousness.
For an 81-year-old male who is pulseless and apneic, his GCS would be the lowest score, which is 3. This is because for eye-opening response (E) he would score 1 (no eye opening), for verbal response (V) he would score 1 (no verbal response), and for motor response (M) he would score 1 (no motor response).