Assistant Laboratory Animal Technician (ALAT) Practice Exam

What term describes the active period of mice, which is typically at night?

1. Diurnal

2. Nocturnal

3. Crepuscular

4. Somnolent

The correct answer is: Nocturnal

The term that describes the active period of mice, which occurs typically at night, is nocturnal. Nocturnal animals are adapted to being active during the night and sleeping during the day. This behavior is influenced by their natural instincts, which help them avoid predators that are active during daylight hours. In contrast, diurnal refers to animals that are active during the day and rest at night. Crepuscular describes animals that are most active during the twilight hours of dawn and dusk. Somnolent relates to a state of drowsiness or sleepiness and does not specifically indicate activity patterns as they relate to time of day. Mice being nocturnal allows them to engage in essential behaviors like foraging and social interaction while minimizing the risk of predation. Understanding these patterns is important in caring for mice in laboratory settings, as it can influence their environmental enrichment and overall well-being.