Final answer:
Late stage hypoxia can present with seizures, bulging fontanel, stiff neck, hemiparesis, and opisthotonos. Other symptoms may include cherry-red skin, cyanosis, confusion, nausea, gasping for air, and metabolic acidosis.
Step-by-step explanation:
The signs and symptoms of late stage hypoxia can include seizures, bulging fontanel (soft spot), stiff neck, hemiparesis (weakness on one side of the body), and opisthotonos (rigid body with arched back and head thrown backward). Other possible symptoms may include cherry-red skin, cyanosis, confusion, nausea, gasping for air, and metabolic acidosis.