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BIOV243 Diverse species > reptiles > Flashcards

reptiles Flashcards

1
Q

What disease are boas and pythons vulnerable to?

A

Inclusion body disease ( very contagious)

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2
Q

What is the renal portal system?

A

Venous return from the posterior part of the body goes through a capillary bed in the kidneys before returning to the heart (not found in mammals)

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3
Q

Why do you not inject into the hind limb?

A

The renal portal system will filter out most of the drug before it reaches other tissues

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4
Q

Can they concentrate urine?

A

No, no animal with a renal portal system has loops of Henle in kidneys

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5
Q

How do replies breath?

A

Must enlarge whole coelom to suck air in as have no diaphragm

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6
Q

What is a cloaca?

A

The final chamber where all products from the GI tact, kidneys and repro system are excreted from

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7
Q

Why do reptiles have a low requirement for o2 and food?

A

They are ectotherms so don’t use energy maintaining body temperature

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8
Q

What is the Jacobson’s organ?

A

In the roof of a snake’s mouth to enhance sense of smell

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9
Q

Describe a snake’s jaw

A

The upper jaw (maxilla) is firmly attached to the skill. The lower jaw (mandible) articulates with the skull and is attached to it by chewing muscles, it is in 2 halves, linked by an elastic ligament, can maove reach side independently

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10
Q

In snakes, are ribs attached to the vertebrae?

A

Yes, all ribs are attached, except the ones caudal to the vent (opening of cloaca)

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11
Q

What is unusual about a snake’s lungs?

A

The left lung is usually absent or a vestigial organ. Boas and pythons have a functioning right and left lung. The caudal npart of the right lung acts as a reservoir of air so the snake can not breath while eating large prey.

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12
Q

In snakes are the kidneys and gonads paired?

A

Yes, except in very slender females, they only have one ovary and oviduct.

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13
Q

What is a snake’s pbt (preferred body temperature) range?

A

18-34°C and 38°C=death

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14
Q

What are the 3 types of chelonian?

A

Turtles (marine), tortoises (terrestial) and terrapins (fresh water)

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15
Q

What is a carapace?

A

The upper portion of a chelonian’s shell

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16
Q

What is a plastron

A

The lower portion of a chelonian’s shell

17
Q

What are scutes and what are they made of?

A

The plates on the outer surface of a chelonian’s shell. They are derived from dermis and epidermis

18
Q

What is the majority of a chelonian’s shell made from?

A

Bone and cartilage

19
Q

What parts of a turtle are fused to the inside of the shell?

A

Ribs and backbone

20
Q

How do turtles excrete nitrogenous waste?

A

Ammonia and urea

21
Q

Yow do tortoises excrete nitrogenous waste?

A

As a uric acid paste

22
Q

What are colour morphs?

A

Animals that have bee selectively bred to be uncommon clues from recessive genes

23
Q

What is a colubrid snake?

A

A nonvenomous constrictor e.g. corn snake (most common pets)

24
Q

What is tail autotomy?

A

When a lizard loses its tail as a defence mechanism. Never grows back the same

25
Q

What do most pet lizards eat?

A

Most are insectivorous, larger ones tend to be omnivorous

26
Q

What is the general term for boas and pythons?

A

Boids

27
Q

What is the most powerful snaknfor its length?

A

Boa constrictor

28
Q

If a snake has a triangular body shape it is …

A

A good climber

29
Q

If a snake has a square body shape Iit is…

A

Very muscular

30
Q

Why should you be careful around a sleeping bermese python?

A

Their heat sensitive pits on their head are active while sleeping and will strike as a reflex if they sense heat

31
Q

Do lizards need a uvb?

A

Yes

32
Q

Do snakes need a uvb?

A

No, they get enough vitamin d from the liver and kidneys of their prey

33
Q

Why do snakes new a large water bowl?

A

To bathe in, this prevents mites and stops them dehydrating during shedding

34
Q

Do turtles/terrapins need a uvb?

A

The semiaquatic ones need one over the basking area

35
Q

Do tortoises require uvb?

A

Yes

36
Q

How can you tell is a lizard is underweight?

A

Look at their tail and legs, they carry most weight here

37
Q

How can you tell is a snake is underweight?

A

You shouldn’t be able to see their ribs and there should be at him layer of fat over their spine

38
Q

What is metabolic bone disease

A

A condition caused by an imbalance of Ca and vitamin D3, it causes misshaped spine and the legs look out of proportion (in lizards)

39
Q

Why do reptiles heal very slowly?

A

They have a very slow metabolic rate

BIOV243 Diverse species (7 decks)

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