Chapter 23 Flashcards
Barbering
dominant animals bite or chew fur of subordinate animals
Cheek pouch
space in oral cavity of hamsters that carries food and bedding
Ectotherm
animals whose internal temperature varies with environmental
temperature – cold-blooded
Endotherm
animal that generates its own heat to maintain a constant internal body temperature – warm-blooded
In vitro
outside living organisms, in test tubes or other lab glassware
In vivo
Inside living organisms
Pinky
mouse or rate hairless neonate
Pithing
destroying the brain and spinal cord by thrusting a blunt needle into the cranium or vertebral column
Rosette
Swirl hair growth pattern in guinea pigs
Scruff
thick skin of the neck by which an animal can be grasped or lifted
Rodents are
are gnawing animals that have continuously growing upper and lower incisors.
Rodents include
hamsters, gerbils, mice, rats, guinea pigs, and chinchillas
Guinea pigs are also called
Cavies
Hamsters are
used as pets and laboratory animals
have cheek pouches to store their food
Ferrets are
are mammals in the same family as weasels and mink
can develop hyperestrogenism
Reptiles are what type of vertebrates
Ectotherm
Four types of reptiles
Turtles/tortoises, snakes, iguanas/lizards, crocodiles/alligators
Amphibians are
larval stage lives in water
adult lives partially or completely on land
Do not have scales
newts and salamanders
frogs and toads
Altricial
young born of hatched very immature or helpless
analogous structures
refers to structures that differ anatomically but have similar functions
antivivisectionist
person who opposes surgery on live animals for research or education purposes
arboreal
tree living
autotomy
voluntary release
barbering
dominant animals bite or chew the fur of subordinate animals
Bolt hold
an entrance or exit in a rabbits warren
Bruce effect
abortion of embryos in recently bred mice so they can re breed with the new male
Calvarium
top of he skull
Chromodachryorrhea
shedding of coloured tear due to porphyrin release form the harderian gland
Crepuscular
becoming active at twilight or before sunrise
Estivate
to reduce body temp, heart and resp rate, and metabolism to dormancy in summer