Answer:- Small animals like rats and mice can feel pain, fear, love, and happiness, just as big ones can.

Answer:- Title: Behavioral Changes Due to Overpopulation in Mice. Previous research has found that if a population were allowed to exceed a comfortable density level, then many catastrophic events occurred such as increased mortality among the young, cannibalism, homosexuality, and lack of maternal functions.

Answer:- While non-animal methods of study have made progress in some fields of biomedical research, their use in neuroscience remains extremely limited due to the complex and interconnected structure of the brain. In most cases, a living and behaving organism remains the only viable model to study the brain in action.

Answer:- Mice and humans share approximately 70 percent of the same protein-coding gene sequences, which is just 1.5 percent of these genomes.

Answer:- Their genetic makeup is known better than that of some other animals.

Answer:- Rats are rodents that do actually serve a purpose in the ecosystem. They are scavengers and opportunistic eaters. They will eat garbage and other things that people throw away. Plus, rats are important as part of the predatory ecosystem.

Answer:- Sprague Dawley (albino rats) are used for this project because they will eat any food typically eaten by humans; they have a digestive system similar to humans; they are small, clean, gentle and easily caged animals; they can safely and easily be handled; they do no transmit disease to humans; and they grow quickly

Answer:- Pain in rodents usually results in decreased activity, piloerection and an un-groomed appearance, or there may be excessive licking and scratching. They may adopt an abnormal stance with ataxia, but rats and mice may become unusually aggressive when handled. Acute pain may cause vocalization.

Answer:- Furthermore, almost all human genes known to be associated with diseases have counterparts in the rat genome and appear highly conserved through mammalian evolution, confirming that the rat is an excellent model for many areas of medical research.

Answer:- The use of animal models allows researchers to investigate disease states in ways which would be inaccessible in a human patient, performing procedures on the non-human animal that imply a level of harm that would not be considered ethical to inflict on a human.

Answer:- To improve our understanding of biology. That means we can study how bodies work by running experiments in animals that would be impossible in human volunteers, and this is where most research animals are used. Studying how healthy bodies function often reveals what is happening when things go wrong.

Answer:- Pros & Cons of Animal Testing Pro: Life-Saving Medications and Vaccines. The landscape of modern medicine would unquestionably be vastly different without animal testing in the mix. ... Con: Inhumane Treatment in Animal Experimentation. ... Pro: Similarity to Humans. ... Con: Lack of Applicability. ... Alternatives to Animal Testing.

Answer:- Animals are typically killed once an experiment is over so that their tissues and organs can be examined, although it is not unusual for animals to be used in multiple experiments over many years. There are no accurate statistics available on how many animals are killed in laboratories every year.

Answer:- While some animals may be used again, or sometimes even adopted out, most animals are humanely euthanized. This is usually because certain information, such as organ samples, can only be taken after the animal is euthanized and the body subjected to further analysis.