Chaoter 19: Rats Flashcards
What is the average weight of a typical newborn rat?
5-6 grams
What of these anatomical characteristics distinguished rats from mice? A- a shorter esophagus B- two upper and two lower incisors C- the lack of a gallbladder D- the presence of premolar teeth
C- The lack of a gallbladder
Which rat is albino, has a wide head, long ears, and a tail that is half it’s body length?
Wistar
True or False
Male rats can usually not be housed together, as they will fight.
False
Which of the following are common inbred strains of rats? Fischer 344 Wistar Sprague Dawley Long Evans Lewis BalbC
Fischer 344
Lewis
Which rat stock is also known as the “hooded” rat?
Long-Evans
What problem can occur if you pick rats up by the tip of the tail?
The skin may slough
List two biological features that rats have in common with mice
Cannot vomit
No premolars or canine teeth
The female rat’s estrous cycle lasts about ________ days
4-5
Rats are nocturnal, meaning that they are ________ at night.
Awake
The reddish material found in tears and saliva of rats is called _________
Porphyrin
Rats are fed free choice and water, which is sometimes referred to as __________
Ad libitum
Because rats are social animals, they should be _________-housed.
Group
Cervical dislocation should only be performed on rats weighing less than _________g.
200
True or False
Rats are generally more relaxed and less prone to biting their handlers than are mice
True
