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Many debilitating psychiatric conditions, including drug addiction, are characterized by poor decision making and maladaptive risk-taking. Recent research has begun to probe this relationship to determine how brain mechanisms mediating risk-taking become compromised after chronic drug use. Currently, however, the majority of work in this field has used male subjects.

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One of the earliest decisions you will need to make when you decide to get some rats is what sex you want. Male rats are called bucks, females are called does, just as in deer and rabbits. There are differences between the sexes, but both can make great pets; it just depends on what you personally want from your rats.

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It will be important for you to identify which kittens are male and which ones are female before they reach sexual maturity around 5 weeks of age. To properly sex a rat from birth, wait for about 2 weeks, or until the kittens have opened their eyes and started eating solid food. In male rats, the distance between the anus and the urethra will be 1.

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There are many varieties of rat with different coat and eye colours. These include white, cinnamon, blue and parti- coloured coats with dark or pink eyes. Male rats are called bucks, females are does and babies are known as kittens.

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Rats have similar physiological reactions to humans when it comes to sex, and perhaps also to orgasm. In fact, a good deal of what we know about what happens in our brains during orgasm comes from the laboratory rat. While much of what happens in the brain during human orgasm remains a mysterydecades of research by scientists has helped unravel some of the secrets.

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Background: Recent evidences suggest that sex hormones may be involved in the regulation of exercise-induced left ventricular LV hypertrophy. However, the sex-specific functional consequences of exercise-induced myocardial hypertrophy is still not investigated in detail. Methods: We divided our young, adult male and female rats into control and exercised groups.

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Systems used to automatically annotate proteins with high accuracy:. Select item s and click on "Add to basket" to create your own collection here entries max. Manual assertion inferred from sequence similarity to i.

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General The laboratory rat, Rattus norvegicus, belongs to the order Rodentia and family Muridae. Rats were first used for experimental purposes in the mid s. Strains were developed to study neuroanatomy, nutrition, endocrinology, genetics and behavior. The rat has short hair, a long naked tail, rounded erect ears, protruding eyes, a pointed snout with long whisker vibrissae and five toes on each foot.

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Eager owners of his pet rats included the Queen herself, and it's rumored—disturbingly—Beatrix Potter. Rats wear them down by continuously gnawing on everything around them, including cement, brick, wood, lead pipes, and other small animals. Thus a pair of brown rats can produce as many as 2, descendants in a year if left to breed unchecked.

Males and females have different care needs. After they reach the age of about 5 weeks, rats are easier to sex than many other small rodents. The males have obvious genitalia; the females do not. Look at the underside of your rat under the base of the tail.

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