Chapter 30: Amphibians

Question 1

Amphibians are ectothermic. What does this term mean?

Answer 1

Body temperature is regulated by external environment

Question 2

What is the term for the larval form of frogs?

Answer 2

Tadpoles

Question 3

Axolotls reach maturity without undergoing metamorphosis. What is this characteristic called?

Answer 3

Neoteny

Question 4

What is the process by which amphibians develop into air-breathing adults with lungs and limbs?

Answer 4

Metamorphosis

Question 5

What is the characteristic of amphibians that protects their skin from mechanical damage and helps retain moisture?

Answer 5

Mucous glands secrete a slimy protective layer

Question 6

What is the genus and species name of the African clawed frog?

Answer 6

Xenopus laevis

Question 7

This animal may release its tail if grabbed during restraint

Answer 7

Large salamanders

Question 8

This animal can be induced to give eggs with a hormone injection

Answer 8

Female xenopus

Question 9

This animal is a salamander that retains its gills in adulthood

Answer 9

Axolotl

Question 10

This animal releases toxins when the parotid gland is pressed

Answer 10

Buck marinus

Question 11

When handling amphibians, what PPE should be worn?

Answer 11

Wet, powder-free gloves

Question 12

True or False
In bullfrogs, the external tympanic membrane is approximately the sam size as the eye in females; I t he male, it is twice as large as the eye.

Answer 12

False

Question 13

True or False

Tattooing is an acceptable method of identification for amphibians

Answer 13

True

Question 14

True or False

Male Xenopus laevis have larger ventral flaps and a larger body than females

Answer 14

False

Question 15

True or False

Amphibians are more tolerant to temperature changes than other vertebrates

Answer 15

False

Question 16

True or False

Male Xenopus laevis have black nuptial pads on the inner forearm and enlarged thumbs at sexual maturity

Answer 16

True

Question 17

List two signs of illness in frogs

Answer 17

1- lethargy

2- loss of appetite

Question 18

Describe the preferred method for cleaning amphibian tanks

Answer 18

Manual cleaning and rinsing followed by heat sterilization

Question 19

What humidity level is generally adequate for amphibian housing?

Answer 19

80%

Question 20

When newly hatched, the housing density for tadpoles should be approximately how many per liter of water?

Answer 20

50