ALAT Animal Health and Biology 5

Question 1

A zebrafish displaying loss of equilibrium and spinning behavior most likely has a problem with its:

Accepted Answer

Swim bladder

Answer

The swim bladder regulates buoyancy; dysfunction causes fish to roll, spin, or sink, a condition often called 'swim bladder disease.'

Question 2

Which physiological parameter is measured by a pulse oximeter in laboratory animals?

Accepted Answer

Arterial oxygen saturation (SpO2)

Answer

A pulse oximeter uses light absorption to estimate the percentage of hemoglobin saturated with oxygen in arterial blood.

Question 3

Chromodacryorrhea (red tears) in rats is caused by secretions from which gland?

Accepted Answer

Harderian gland

Answer

The Harderian gland of rats secretes porphyrin-rich fluid that appears red around the eyes and nose, indicating stress or illness.

Question 4

The term 'epizootic' in laboratory animal medicine refers to:

Accepted Answer

A disease outbreak affecting many animals simultaneously within a population

Answer

Epizootic describes the animal equivalent of an epidemic — a sudden increase in disease cases affecting a large portion of the colony.

Question 5

Which of the following is a correct statement about thermoregulation in neonatal rodents?

Accepted Answer

Neonates are poikilothermic and depend on maternal warmth

Answer

Newborn rodents are poikilothermic (unable to self-regulate body temperature) and rely on the dam and nestmates for warmth until about 2 weeks of age.

ALAT - Assistant Laboratory Animal Technician Practice Test

ALAT - Assistant Laboratory Animal Technician Practice Test

ALAT Animal Health and Biology 5