Homeostasis and thermoregulation

Figure 3 shows how the internal body temperature of a common lizard and a field mouse changes as the external environmental temperature changes.

Figure 3: Line graph of internal body temperature against external temperature for a common lizard and a field mouse

External temperature / °C	Field mouse internal temperature / °C	Common lizard internal temperature / °C
10	37	11
15	37	15
20	38	20
25	38	25
30	38	30
35	38	35
40	39	39

Describe how the internal body temperature of the common lizard changes in response to the external temperature.

[2]

Homeostasis and thermoregulation Questions

Figure 3 shows how the internal body temperature of a common lizard and a field mouse changes as the external environmental temperature changes.

Figure 3: Line graph of internal body temperature against external temperature for a common lizard and a field mouse

External temperature / °C	Field mouse internal temperature / °C	Common lizard internal temperature / °C
10	37	11
15	37	15
20	38	20
25	38	25
30	38	30
35	38	35
40	39	39

Describe how the internal body temperature of the common lizard changes in response to the external temperature.

[2]