Embedded Files
Hypotheses
Hypotheses
H1: We expected body temperature in wintering mammals to have a lower mean value.
H2: We expected temperature in wintering mammals to have more variability.
H1 Results
H1 Results
Although wintering mammals had a lower overall body temperature when exposed to cold conditions, it was not significantly different from control condition internal body temperature.
Figure 1
Figure 1
Body temperature of mice during day and night when housed in control conditions (25°C) and cold conditions (4℃ ). Averages are 35.76 °C for control conditions and 35.25°C for cold conditions.
Figure 2
Figure 2
Body temperature of mice during day and night when housed in control conditions (25°C) and cold conditions (4℃ ). Averages are 35.44 °C for Control Day and 36.07 °C for Control Night; 35.21°C for Cold Day and 35.29 °C for Cold Night.
H2 Results
H2 Results
Cold-exposed wintering mammals exhibited differences in body temperature regulation compared to controls; however, variability did not consistently differ across the day-night cycle.
Figure 3
Figure 3
Internal body temperature of mouse 23-01 across 14 days, housed in control conditions. Yellow bars mark light 12:12 from 7:00 to 19:00.
Figure 4
Figure 4
Internal body temperature of mouse 23-03 across 14 days, housed in cold conditions. Yellow bars mark light 12:12 from 7:00 to 19:00.
Discussion
Discussion
Based on the above results, we can conclude that cardiac adaptations to cold temperatures are sufficient to maintain body temperature in the cold, producing cardiac hypertrophy in wintering mammals. This statement is supported by the data that the body temperatures between the control and cold conditions were not significantly different. As seen in Figure 2, internal body temperature averages between the conditions were similar.
Future Directions
Future Directions
Explore relationship between circadian rhythm and other physiological processes.
Compare hypertrophy responses across different species and environmental conditions.
Factors responsible for prolonged hypertrophy.
Jess Guilfoyle
Undergraduate PresenterJess Guilfoyle
I’m a senior Biology and Premedical Studies major with interests in physiological research, data analysis, and medicine. Outside studying thermoregulation in the lab, I work as a patient care assistant at UC Medical Center and lead a Spanish club for elementary students, exploring my passions for patient care and health equity.
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