Rat quiz

Question 1

Majority of lab rats are what species?

Answer 1

Brown rat or Norway Rat

aka: Rattus norvegicus

Question 2

How many chromasomes does the brown rat have?

Answer 2

42

Question 3

All rodents have a single pair of _____ on each jaw

Answer 3

Incisors

Question 4

___% of the rat consists of its’ tail

Answer 4

85%

Question 5

What are two uses of a rat’s tail?

Answer 5

Balance and heat abatement

Question 6

Where are a rat’s sweatglands found?

Answer 6

Hairless foot pads

Question 7

How many digits are on the front and hind limbs?

Answer 7

4 on front, 5 on back

Question 8

What is the anatomical feature responsible for red eyes in the rat?

Answer 8

Harderian gland (lacrimal gland containing prophyrin)

Question 9

What is chromodacryorrhea?

Answer 9

Increase in red tears caused by stress or disease

Question 10

What is the average life span for a rat?

Answer 10

26-40 months

Question 11

What is the average weight for a male rat?

Answer 11

267-500g

Question 12

What is the average weight for a female rat?

Answer 12

225-325g

Question 13

What is the normal HR for a rat?

Answer 13

313-493 bpm

Question 14

What is the normal RR for a rate?

Answer 14

71-146 bpm

Question 15

What is the normal temperature for a rat?

Answer 15

96.6-99.5

Question 16

What is the daily feed consumption for a rat?

Answer 16

15-20 g

Question 17

What is the daily water consumption for a rat?

Answer 17

22-33ml

Question 18

What is the recommended evironmental temp for rats?

Answer 18

21-24 degrees C

Humidity 45-55%

Question 19

What is the gestation length for rats?

Answer 19

21-23 days

Question 20

What type of estrus cycle do rats have?

Answer 20

Continuous polyestrus

Question 21

Why are rats useful for toxicology studies?

Answer 21

Inability to vomit

Question 22

Type of rat that has been randomly bred; not inbred. Referred to as outbred.

Answer 22

Stock

Question 23

Type of rat that has been inbred

Answer 23

Strain

Question 24

What is the goal of a strain?

Answer 24

Develop a strain of animals that are genetically homozygous

Question 25

What is inbreeding depression?

Answer 25

Decrease in reproductive capability of successive generations

Question 26

A strain is designated with what?

Answer 26

Upper case letters

Question 27

A substrain will have a ___ \_\_\_\_ after the strain designation

Answer 27

Slanted Line

Question 28

Develop as a result of genetic mutation in existing strains, then perpetuated in future generations

Answer 28

Coisogenic

Question 29

In what manner are Athymic (nude) animals developed?

Answer 29

Congenic

Question 30

What is an F1 hybrid?

Answer 30

Direct result of mating between 2 different inbred strains

Question 31

—Derived by removing specific DNA sequences from one strain or species & inserting them into an ovum just after fertilization. The ovum is then transplanted into a pseudopregnant female that serves as a serrogate. Used for gene-related disorders.

Answer 31

Transgenic Animals

Question 32

—Removes or blocks a specific gene from an animal; used to study diseases associated with defective genes. Ex) Sickle cell anemia; cystic fibrosis.

Answer 32

Knockout animals

Question 33

What animals assist in the development of gene therapy?

Answer 33

Knockout animals

Question 34

Albany rats are linked to what disease?

Answer 34

Mammary tumors

Question 35

Brown rats are linked to what disease?

Answer 35

Myeloid leukemia

Question 36

Buffalo rats are linked to what disease?

Answer 36

Autoimmune

Question 37

Fisher 344 rats are linked to what disease?

Answer 37

Esophogeal and bladder cancer

Question 38

What are some common strategies used to confirm genetic purity?

Answer 38

Protein electrophoresis, serologic testing, mandible measurement and backcross mating

Question 39

What is the preferred bedding for rat housing?

Answer 39

hardwood shavings or corn cob

Question 40

Why are soft woods not used for bedding?

Answer 40

Respiratory problems and hepatic issues

Question 41

What can excess noise cause?

Answer 41

Audiogenic seizures, cannabolism and decreased reproductive rates

Question 42

What can low humidity cause?

Answer 42

Ring tail

Question 43

Pregnant/lactating females require \_\_X the amount of normal nutrition

Answer 43

4X

Question 44

Rat food should contain \_\_-\_\_% protein and \_\_% fat

Answer 44

20-25% protein and 4% fat

Question 45

What is the shelf life for most commercial foods?

Answer 45

6 months passed milling date

Question 46

What are three different restraint tools for rats?

Answer 46

Plastic restraint boxes, stockinette, plastic cone

Question 47

Bacterial disease caused by Bacillus piliformis causing hepatic necrosis and myocardial degeneration

Answer 47

Tyzzer's disease

Question 48

Opportunistic pathogen, causes URI and pneumonia

Answer 48

Pasteurellosis

Question 49

Rare bacterial disease in rats characterized by chromodacryorrhea, nasopharynx inflammation, pleuritis and meningitis

Answer 49

Streptococcus

Question 50

"Rat bite fever" or "Haverhill fever" Present in nasopharynx of normal rats, not disease causing agent

Answer 50

Streptobacillosis

Question 51

Most significant viral diseas of rats

Answer 51

Sialodacryoadenitis

Question 52

Viral disease that usually remains subclinical in rats

Answer 52

Sendai virus