Intermale aggression is reduced in
A) mice whose vomeronasal nerves have been surgically damaged.
B) rats after cutting the vagus nerve.
C) mice after cutting the vagus nerve.
D) mice that have been sprayed with urine from an intact male mouse.
E) male mice prior to copulation.

Question

Quizplus · Accepted Answer

The vomeronasal nerves are responsible for detecting pheromones, which play a role in intermale aggression in rodents. Surgically damaging these nerves reduces the ability of mice to detect these pheromones, resulting in reduced aggression. Cutting the vagus nerve has been shown to reduce anxiety and stress in male rats, but it does not directly affect intermale aggression. Spraying male mice with urine from an intact male mouse is likely to increase rather than reduce aggression. There is no evidence to suggest that male mice are less aggressive prior to copulation.

Intermale Aggression Is Reduced in