MOD 3 - COURSE 3 - BIOLOGY OF SPECIES SPECIFIC FEATURES - PT 1 - MICE Flashcards
(31 cards)
WHY DO WE USE MICE
-inexpensive
- easy to maintain
- efficient breeders
- reproduce quickly
whats malocclusion?
oconditions where upper and lower incisors = not properly aligned - so the teeth dont wear down naturally when they eat
what health problems can be caused by malocclusion
- facial abscesses
- weight loss
- death
what teeth do mice have
one pair lower and upper incisors
1/1 0/0 0/0 3/3 - one incisor, 3 molars and no canines or premolars per quandrant (dental formular)
mice cannot vomit True or false?
true - lack neural pathways - connecting oesophagus at stomach - prevents regurgitation
what does the small size of the mice mean?
- high metabolic rate so high drug clearance
- large SA of body so can be vulnerable to hypothermia
do mice have sweat glands
none apart from foot pad
what is a mouses halftime turn over of water?
1.1 days
how do you tell the difference between males or females
the distance between anus and urogenital opening = greater for males than females
female mice are polyestrous - what does this mean
more than one oestrous cycle - heat per year
when does a mice become sexually mature
40-60 days
how long is the oestrous cycle of a mice
4-5 days and 24 hours post partum
how long is the gestation period of mice
- 19-21 days
- gestation = time between conception and birth
whqat is the normal litter size of mice
6-12
how long do the mice pups wean for?
21 days
- no longer dependend on mothers milk after 21 days
what can be used as a sign of successful mating between female and male mice
- mucous plug in female vagina - 24 hours
is mating between micr polygamous or monogamous or both?
both (can be 1 male : 1 female or 1 male : many females)
what is the body weight of adult, weanling and newborn mice
25-40g
10-15g
~1g
what is normal mice body temp
36.4’C-38’C
what is the normal HR of mice
328-780bpm
what is respiration rate of mice
- 90-220bpm
what is the daily food and water intake of mice?
3-6g
4-7ml
what is the normal life span of mice
1-3 year
what does outbred stock mean
colony of lab aniamls within which there is some genetic variation which has been closed for at least 4 generation
