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Animal Care > Rats And Mice > Flashcards

Rats And Mice Flashcards

1
Q

The taxonomic name for the laboratory mouse is what
(Also known as the house mouse or Swiss albino)

A

Mus musculus

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2
Q

The taxonomic name for a laboratory rat is what

A

Rattus norvegicus

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3
Q

The tail of a rat or mouse functions as an organ that does what

A

Balance and mechanisms for heat loss

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4
Q

Rats dissipate heat through what part of their body

A

Tail and ears

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5
Q

Rats and mice have how many digits on the front and back feet

A

4 digits on the forelimb and 5 on the hind limbs

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6
Q

Secretions from the harderian gland contain poryohyrin, a red pigmented substance commonly referred to as what

A

Red tears

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7
Q

What is the term for, Secretions of the harderian gland may in increase when the animal is I’ll or stressed

A

Chromodacryorrhea

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8
Q

Because rats and mice teeth grow continuously there are considered

A

Hyposodontic

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9
Q

Rats do not have what organ

A

The gallbladder

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10
Q

The ____ in the rodent stomach is responsible for the animals inability to vomit

A

Limiting ridge

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11
Q

Determination of gender can be accomplished how

A

At birth

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12
Q

Male mice reach sexual maturity by ___ days

A

50

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13
Q

Female mice reach sexual maturity by __ days

A

50-60

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14
Q

The gestation period for mice is

A

19-21 days

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15
Q

What is the gestation period for rats

A

22 days

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16
Q

Weaning occurs in mice at

A

11-14 days

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17
Q

Weaning occurs in rats by

A

3-4 weeks

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18
Q

Mice can have up to how many pups

A

10-12

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19
Q

Rats can have up to how many pups

A

6-12

20
Q

If a pregnant female mouse is exposed to a new male or it’s odor within 4 days of breeding, the existing pregnancy will usually be aborted and the female will return to estrus

A

The Bruce effect

21
Q

Stock refers to

A

The type of rat or mouse that has been randomly bred

22
Q

Strain refers to

A

The type of rat or mouse that has been inbred

23
Q

When 20 or more generation of brother-sister or parent-offspring mating have occurred, the offspring are referred to as

A

Inbred

24
Q

Temperature for rats and mice should be maintained at __ to __ and humidity of __ to __%

A

65-75
40-60%

25
Q

A group of rats or mice is called

A

A mischief

26
Q

Low humidity predisposes rats to a condition called

A

Ringtail

27
Q

True or false
Excess noise may cause cannibalism and drop reproductive rates

A

True

28
Q

The eating of feces that is normal behavior for rats and mice is called

A

Coprophagic

29
Q

The shelf life of most commercial rodent chow is approximately how long after the milling date

A

6 months

30
Q

Aggressive rats usually require the use of ____ when handling

A

Leather or chain gloves

31
Q

IV injections can be given where

A

Saphenous, jugular, femoral, or lateral tail veins

32
Q

IM injections can be given where

A

Quadriceps, gluteals, and triceps

33
Q

IP injections can be given where

A

Lower left quadrant of the abdomen

34
Q

What is the appropriate sized needle to use for the collection of blood from the lateral tail vein of a rat.

A

22 gauge or smaller needle or a butterfly catheter

35
Q

The causative agent is Gram negative, spore forming, flagellated bacterium clostridium piliforme. The organism is transmitted through fecal-oral route and some clinical signs can be diarrhea or anorexia

A

Tyzzers disease

36
Q

A chronic bacterial infection. The causative agent is mycoplasma pulmonis . Affected animals may demonstrate a head tilt, sneezing, snuffling, rakes, and dyspnea

A

Marine respiratory mycoplasmosis

37
Q

May be fatal to immunocompromised mice or rats. Some clinical signs can be upper respiratory infections or pneumonia. Abscesses may occur in skin, lymph nodes, uterus, and urinary system

A

Pasteurellosis

38
Q

Young rats are particularly susceptible and this harbors bacterium in the upper respiratory tract and the infection can occur when under stress.

A

Streptococcis

39
Q

Normal HR for a rat is

A

313-493BPM

40
Q

Normal HR for a mouse is

A

247-697BPM

41
Q

Normal RR for a mouse is

A

91-216 BPM

42
Q

Normal RR for a rat is

A

71-146 BPM

43
Q

Alopecia around head and muzzle or truck from cage mates chewing

A

Barbering

44
Q

Common in rats that have been kept in low humidity. Causes annular constrictions in tail, leads to sloughing, edema, necrosis. Shoebox type cages help keep humidity up.

A

Ringtail

45
Q

Caused by continuous growth if incisors

A

Malocclusion

Animal Care (13 decks)

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