1.A naturalist once noted that when a male bird stakes out his territory, he sings with a very sharp, staccato song that says, in effect, “Here I am, and stay away!” In contrast, if a predator appears in the vicinity, many birds will emit alarm calls that consist of steady whistles that start and end slowly. Knowing what you do about the two means of localizing sounds, why do these two types of calls have different characteristics?
2. Why can slow, repetitive vestibular stimulation cause nausea and vomiting? Obviously, there are connections between the vestibular system and the area postrema, which (as you learned in Chapter 2) controls vomiting. Can you think of any useful functions that might be served by these connections?
