Other Rodents_BBCh7 Flashcards
- The one characteristic shared by all rodents is:
a. Hypsodontic teeth
b. Harderian glands
c. Vesicular glands
d. Specialized dentition for gnawing
d.
- The term “rodent” is derived from the Latin “rodens” meaning eating. (TorF)
False. It means gnawing
- The toothless interval between rodent incisors and the first cheek tooth is called the_____________________.
diastema
- Describe the “self-sharpening” system of gnawing in rodents.
Enamel is deposited on the anterior and lateral incisor surfaces while dentin is deposited on the posterior surface. As the rodents chew and gnaw. the softer dentin is worn away, leaving a chisel-like enamel edge.
- Mammologists divide rodents into three groups based on:
a. Whether or not they have a tail
b. Number of teeth
c. How the masseter muscle attachments evolved
d. Type and number of accessory sex glands
c.
- In hystricomorpha rodents, the __________ foramen has become very large.
infraorbital
- The two rodent suborders are ________________ and ________________.
Sciurognathi and Hystricognathi
- The genus for ground squirrels is:
a. Spermophilus
b. Cynomys
c. Geomys
d. Microtus
a.
- The main use of squirrels in research is to study ____________________.
hibernation
- By feeding a high cholesterol diet to the Richardson’s ground squirrel, what type of stones are formed?
gallstones
- Ground squirrels have a gestation period of approximately:
a. 10-20 days
b. 23-31 days
c. 30-40 days
d. 42-47 days
b.
- How many litters a year does the normal female ground squirrel have?
1
- A ________ (type of rodent) diet may be used to feed ground squirrels.
rat
- Name two conditions that are needed to induce hibernation in ground squirrel in a laboratory situation.
non-lighted room and ambient temperature 5-10 C.
- In Alaska and Southern California, ground squirrels commonly become infected with plague, which is:
a. Corynebacterium ulcerans
b. Staphylococcus aureus
c. Yersinia pestis
d. Hoplopsyllus anomalus
c.
- The type of hepatitis associated with ground squirrel hepatitis virus (GSHV) is:
a. Fulminate and acute
b. Zoonotic
c. Severe and chronic
d. Mild to moderate and chronic
d.
- The most prevalent intestinal parasite in ground squirrels is:
a. Capillaria hepatica
b. Eimeria
c. Sarcocystis
b.
- Hepatocellular carcinoma has developed in California ground squirrels infected with:
a. GSHV
b. Hepatitis B
c. Woodchuck Hepatitis Virus (WHV)
a.
- What is the genus and species of the black-tailed prairie dog?
Cynomys ludovicianus
- The black-tailed prairie dog is commonly used to study which conditions?
a. Hepatitis
b. Hepatocellular carcinoma
c. Hepatitis lymphoma
d. Biliary physiology and gallstones
d.
- Female prairie dogs do not start breeding until they are how old?
2 years of age
- Prairie dogs have high concentrations of what blood component?
a. Eosinophils
b. Basophils
c. Small Platelets
d. Reticulocytes
c.
- Along with hepatocellular carcinomas, what is the other highly occurring neoplastic disease in prairie dogs?
a. Elodontomas
b. Squamous cell carcinomas
c. Melanomas
d. Astrocytomas
a.
Briefly describe the mechanism used by pocket gophers that allows them to gnaw dirt while burrowing and not get any dirt in their mouths.
Their lips close behind their incisors, allowing them to gnaw without getting dirt in their mouth.
Pocket gophers are ____________ and spend most of their life underground.
fossorial
- Pocket gophers have been important models for what type of research:
a. Cancer
b. Hepatic function
c. Molecular Evolution
d. Hepatitis
c.
- The gestational period for pocket gophers is:
a. 18-19 days
b. 29-30 days
c. 24-25 days
d. 40-42 days
a.
- The main ingredients in a pocket gopher diet are ____________________ and ______________.
roots and tubers
- The two genera making up pocket gophers are ___________________ and _________________.
Geomys and Thomomys
- Approximately 90% of wild pocket gophers have coccidian oocysts in their intestines. The genus of coccidian found is ______________.
Eimeria
- ________ species of biting lice have been found in pocket gophers. This is helpful because it allows researchers to further study speciation among pocket gophers.
a. 100
b. 30
c. 44
d. 122
d.
The genus and species for the bannertail kangaroo rat is _________ _________.
Dipodomys spectabilis
All species of kangaroo rats are found on what continent:
a. Africa
b. North America
c. South America
d. Europe
b.
The two related areas of research that kangaroo rats are used for are _______
renal physiology and water conservation.
The __________ gland is a prominent androgen-independent, oil-secreting gland that is present on the back of kangaroo rats, between the shoulders of both males and females.
dorsal
- Ad libitum water is recommended for kangaroo rats. (T or F)
False. Ad lib water can to diabetes insipidus.
- What animals require dust baths as a regular component of their husbandry?
Chinchillas, kangaroo rats, and degus
- What is the genus name for wood or pack rats?
Neotoma
- Wood rats have been used in what type of research:
a. Behavioral
b. Neurological
c. Zoonoses
d. All of the above
d.
- Name four zoonotic agents that are known to infect wood rats.
- Trypanosoma cruzi (Chagas’ Disease), Leishmania mexicana (cutaneous leishmaniasis), Yersinia pestis, Borrelia burgdorferi, Sin Nombre Virus (hantavirus), Whitewater Arroyo virus (arenavirus)
- Name the two species (genus and species names) for two commonly studied grasshopper mice.
Onychomys torridus and O. leucogaster
- What zoonotic disease has been studied in grasshopper mice:
a. Rabies
b. Plague
c. Chagas’
d. Lyme
d.
- Grasshopper mice are largely carnivorous. (T or F).
True
- The ______________ ________________ gland is probably used for territorial marking.
midventral sebaceous
- When infected with the Lyme disease causative agent, grasshopper mice develop:
a. Hepatitis
b. Heart failure
c. Cystitis
d. Orchitis
c.
- The two most commonly used species of the genus Peromyscus are ______________ and _______________.
P. maniculatus and P. leucopus
- The main zoonotic agent of interest studied in deer mice is:
a. Borrelia
b. Yersinia
c. Rabies
d. Hantavirus
d.
Ectoparasites have been effectively treated with 5% ___________ ___________ dust prior to entry into laboratory animal facilities.
methyl carbamate
- Deer mice will seroconvert and show clinical disease from mouse hepatitis virus. (T or F)
False. When they seroconvert, they do not show clinical disease.
- What is the genus and species of the most commonly studied rice rat?
Oryzomys palustris
- The main area of studies in rice rats is on ______________ _____________, which they spontaneously develop.
a. Periodontal disease
b. Heart failure
c. Liver failure
d. Glomerulonephritis
a.