Answer:
Serotonin is thought to be the underlying neurotransmitter involved in migraine, based on a lower than normal level of serotonin (5-HT) which increases during attacks.
Answer:
The serum used for emergency treatment of snakebites stimulates artificial passive immunity.
Answer:
Severe neck stiffness or pain.
Confusion or extreme irritability.
Extreme sleepiness.
Persistent nausea or vomiting.
Severe sensitivity to light (photophobia).
Explanation: