MOD 3 - COURSE 3 - PT 2 - RAT

Question 1

rats have a gall bladder T/F?

Answer 1

F

Question 2

what is porphrin and what can this indicate in rats

Answer 2

• red- brown pigment - secreted by haderian glands located behind the eyes
• secreted in times of stress, illness other issue
• can deposit around the nose

Question 3

whats the weight of rat adult female and male

Answer 3

300-500g, 200-400g, ~5g

Question 4

avg body temp fo rats?

Answer 4

35.9-37.5’C

Question 5

heart rate avg of rats

Answer 5

250-600 bpm

Question 6

respiration rate of rats

Answer 6

66-144 BreathPM

Question 7

dailing avg food and water intake of rats?

Answer 7

5-6g/100g daily body weight
10-12ml /100g body weight daily

Question 8

avg lifespan of rats

Answer 8

2.5-3.5 years

Question 9

how do you determine sex of the animal

Answer 9

• twice as long anus-urogenital opening distance in males than females

Question 10

are rats polyoestrous or monooesterous

Answer 10

polyoesterous

Question 11

when do rats reach sexual maturity

Answer 11

~50 days

Question 12

how long is there oestrous cycle

Answer 12

• 4-5 days
• 24 hours post partum

Question 13

whats the gestation period of rats

Answer 13

20-22 days

Question 14

whats the avagerage litter pup size of rats ?

Answer 14

7-11 PUPS

Question 15

how old is the weaning age of young rats?

Answer 15

21 days

Question 16

what are some example of outbred stocks

Answer 16

Wistar (WI)
Sprague Dawley (SD)
Long-Evan (LE)

Question 17

What are some of the characteristics of Wistar WI strain of rat?

Answer 17

• albino rat
• wide head and long ears
• tail shorter than body

Question 18

whata re some charactersitics of Sprague-Dawley SD strain of rat

Answer 18

• albino
• long and narrower head
• tail smae legnth as body

Question 19

what are some characteristics of Long-Evan LE strain of rat

Answer 19

• smaller rat than others
• white body with black patches
• head- black hood

Question 20

what are some examples of inbred strains of rats

Answer 20

• Lewis LEW
• Fisher344

Question 21

what are some characterisitc of the Lewis LEW strain of rat?

Answer 21

used for toxicology and tetraology study of birth defects

Question 22

what are some characteristics of Fisher 344 strain of rat

Answer 22

used in immunological studies and diabetes research

Question 23

what are some usual behaviours of rats

Answer 23

• noctournal
• posture - erect on all 4 legs and hunched arrpearance cnan be a sign of disease
  lifestyle, very high metabolic rate, active grooming, very adaptable to group housing
• rarely agressive