BB AALA Ch19 Reptiles Flashcards
- Reptiles are ________ so they require an external heat source, that they can move into and away from as needed, and warm ambient temperatures to maintain normal metabolic processes.
poikilothermic
- If species information on a preferred temperature range is unavailable, a range of ________ is generally acceptable.
26-32 C
- Which of the following statements is false regarding reptiles?
a. The reptilian glottis is positioned more rostrally than the mammalian laryngeal opening.
b. Snakes and lizards have complete tracheal rings.
c. Turtles and crocodilians have complete tracheal rings.
d. In snakes the glottis lies immediately behind the tongue sheath allowing the snake to breath while slowly swallowing large prey.
b is false
snakes and lizards have INCOMPLETE tracheal rings
- Which of the following statements is false regarding reptilian lungs?
a. All reptilian lungs are simple, endothelium lined sacs.
b. In some species, lungs terminate in air sacs.
c. Paired lungs are present in crocodilians, turtles and lizards.
d. Most snakes have a single, functional right lung and a vestigial left lung.
a is false by caveat
All reptilian lungs are simple, endothelium lined sacs, EXCEPT CROCODILIANS
- Which of the following statements is false regarding reptiles?
a. Reptiles lack a true muscular diaphragm.
b. Reptile respiration is controlled by hypercapnia, hypoxemia and environmental temperature.
c. The ribs of turtles are fused to their carapace immobilizing their intercostals muscles so they must use their limbs and pelvic girdle to assist ventilation.
d. Reptiles decrease their tidal volume in response to elevated environmental temperatures and elevated carbon dioxide levels.
d is false
Many reptiles increase tidal volume in response to elevated temperature and elevated carbon dioxide levels
- A minimum of _____ hours of fasting time is recommended for reptiles prior to anesthesia.
24-48
- True or False: Reptiles can be anesthetized with either inhalant or injectable agents, however inhalants are preferred because of the relatively rapid induction and recovery times.
True
- Which of the following statements is false regarding reptile restraint?
a. Lizards should be restrained behind the head, supported minimally at the pectoral and pelvic girdle and held by the tail.
b. Cylindrical plexiglass tubes protect the handler from bites and allow access to injection sites.
c. Autotomy, or tail amputation in a fracture plane, is an escape mechanism of some species of lizards.
d. Lizards will slap their tails as a defensive behavior; this can be quite painful to the holder.
a is partially true
True: Lizards should be restrained behind the head, supported minimally at the pectoral and pelvic girdle.
Lizards should NOT be held by the tail.
- Which of the following statements is false regarding reptile restraint?
a. Turtles either move their limbs frantically in an attempt to escape or withdraw into their shell.
b. All crocodilians will attempt to roll when restrained.
c. Crocodiles are often easy and safe to handle.
d. Small crocodilians should be restrained similar to lizards; larger crocodilians require two people for restraint.
c is false, duh
- True or False: A minimum of two people should be present if venous reptiles are to be manipulated.
True
- Which of the following statements is false regarding venomous reptile species?
a. Antivenom is not necessarily needed onsite unless you expect to be bitten.
b. Plexiglass tubes of appropriate size should be used for restraint of venous species.
c. Extreme caution is necessary when working around fangs to prevent accidental inoculation.
d. Depth of anesthesia must be verified before removing a venous reptile from an induction chamber.
a is false, duh
What are acceptable sites for IV injection or catherterization in lizards? In snakes? In turtles?
Lizards: ventral coccygeal vein, ventral abdominal vein
Snakes: ventral coccygeal vein, right jugular vein (with cutdown)
Turtles: dorsal venous sinus (on dorsal midline of tail), jugular vein
- Which of the following statements is false?
a. Endotracheal intubation is very difficult in reptiles.
b. Intubation of reptiles is recommended to ensure adequate anesthetic induction and ventilation.
c. Reptiles are hypoxia tolerant and can convert to anaerobic metabolism.
d. Lidocaine can be applied to the glottis before intubation.
a is false
- Which of the following statements regarding inhalant anesthesia in reptiles is false?
a. Halothane can rapidly reach lethal concentrations and should be avoided in reptiles.
b. A rebreathing circuit is appropriate for most reptile species.
c. Isoflurane is the agent of choice.
d. Sevoflurane has been used in reptiles
b is false
A NON-rebreathing circuit is appropriate for most reptile species. Very large animals (>10 kg) may require a standard circle system.
- ___________ can be administered intramuscularly and in combination with other agents, such as medetomidine, for anesthetic induction prior to intubation and for minor procedures in reptiles.
ketamine