Abstract
Summary
Wild hares have 20 to 23 units of Substance P/g of brain. This amount does not change when animals are kept 14 days in cages in a state of fear, although hyperthyrosis develops during this time. When Substance P is given intravenously its amount in the brain increases. Wild hares given Substance P intravenously behave like tame rabbits.
Get full access to this article
View all access options for this article.