Question: When a dog smells food and begins drooling, it is responding to an external stimulus. Which of these describes a response to an internal stimulus?
Pick your answer from:
+ A cat sees a mouse and crouches..
+ A parrot hears a name and repeats it..
+ A person eats spoiled food and vomits..
+ A worm senses water and moves to the surface..
Answer:
A person eats spoiled food and vomits.