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Rats and Mice
Laboratory Animals and Exotics
| Question | Answer |
|---|---|
| What does the word rodent mean? | "to gnaw" |
| Mus musculus is the taxonomic name for what kind of mouse? | laboratory |
| The taxonomic name for the common rat is what? | Rattus norvegicus |
| Define fecundity. | reproductive potential |
| Why is the rat used for human dental research? | their molars resemble humans |
| What are three characteristics of a rat's tail? | it has scales, it is hairless, and it is longer than their body length |
| What two body organs do rats and mice use to dissipate heat? | tail and ears |
| How many digits are on the front limbs of rats and mice? | four |
| How many digits are on the hind limbs of rats and mice? | five |
| Why do rats continously grow? | because their epiphyses of their bones do not close |
| Where are harderian glands located? | orbit of the eye |
| What is the medical term for "red tears" | chromodacryorrhea |
| What type of teeth do mice and rats have? | hypsodontic-continously growing |
| Where is the brown fat located on rats and mice? | around the neck and between the scapulas |
| What is the purpose of brown fat? | it gives 10 times the energy storage than other types of fat |
| What anatomical feature makes rats and mice unable to vomit? | the limiting ridge |
| Where is the pancreas located? | throughout the mesentery |
| What organ of digestion do rats not have? | gall bladder |
| Describe the male penis. | it is an os penis |
| How long is the gestation period for rats? | 22 days |
| Rats and mice are born altricial. What does that mean? | hairless, blind, and deaf at birth |
| What time during a 24 hour period do rats and mice usually breed? | night |
| Define Whitten effect. | when groups of females live together without a male they will enter anestrus but if exposed to a male or smell a male they will all be in estrus in 3 days |
| What is the Bruce effect? | when a pregnant female mouse is exposed to a new male mouse or his odor within four days of being bred she will abort the pregnancy and return to estrus |
| When are mice and rats usually active? | night time they are nocturnal |
| What is a group of rats called? | mischief |
| What causes ringtail in rats? | low humidity |
| Why would you place a rodent onto a platform that raises them upward when taking a radiograph of them? | because they are so small it would magnify the image where you could see structures better |
| What radiographic views are most commonly done on rodents? | VD, DV, lateral |
| When collecting blood on a rodent and the method used is retroorbital, what must be done first?? | anesthesia |
| The commonly used anesthestic on rodents is what? | isoflurane |
| Which rodent that we have studied has a hairy tail? | gerbils |
| Which rodent should not be picked up by the tail? | gerbil |
| What kind of teeth do rodents have? | hypsodontic |
| Which gland do mice and rats not have? | sweat |
| Out of all of the diseases that we have covered concerning rodents, which one is common to all? | tyzzer's |
| Which of the rodents that we have studied has the longest gestational period? | guinea pig |
| Which rodent is monogamous? | gerbils |
| Which rodent is a wonderful pet for children? | gerbils |
| Why does the rat make a poor model for heart research? | their heart resembles a fish heart instead of a mammals |
| Why is endotracheal intubation in guinea pigs difficult? | because of the palatal ostium and thick tongue |
| Which rodent has teeth that resemble humans teeth? | rats |
| What is a group of rats called? | mischief |
| Where is the venous access on the rat that is commonly used? | lateral tail vein |
| What kind of a gland is the Harderian gland? | lacrimal |
| Where is the Harerian gland located? | orbit of the eye |
| Define chromodacyorrhea. | secretion of porphyrin |
| Ringtail is caused by what? | low humidity |
| The diet of guinea pigs needs to be supplemented with which vitamin? | C |
| What is the gram-negative disease found in all laboratory animals that forms spores and is caused by Bacillus piliformis bacteria? | Tyzzer's disease |
| What does a female hamster sometimes hide in her cheek pouches? | her babies |
| Which rodent will stomp their hind legs when in stressful situations or in fear? | gerbil |
| Which rodent that we have studied hibernates? | hamster |
| Proliferative ilietis is also called what? | wet tail in hamsters |
| Guinea pigs can get what is called "slobbers" and it is caused by what? | malocclusion |
| Vitamin C deficiency in guinea pigs causes what disease? | Scurvy |
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