Figure 6.1 shows a diagram of a cross‑section of human skin.
State the letters in Figure 6.1 that identify the part that:
contracts to raise the hair
produces liquid that cools the skin
shows a cell type that provides insulation
6(b)(i)Maths Skills BiologyMedium3 marks
A scientist monitored the skin temperature of a person, on two different parts of the body, in a warm environment and then in a cold environment.
Table 6.1 shows the results.
Table 6.1
part of the body
skin temperature in a warm environment / K
skin temperature in a cold environment / K
percentage decrease in temperature
chest
307.7
303.3
1.4
finger
306.4
294.2
Using the information in Table 6.1, calculate the percentage decrease in the skin temperature of the finger between a warm environment and a cold environment.
Give your answer to the appropriate number of decimal places.
Answer
%
6(b)(ii)ThermoregulationEasy2 marks
One of the roles of the skin is to help to control the internal temperature of the body.
Describe how a change in the internal body temperature is detected.
Answer
0 words
6(b)(iii)ThermoregulationMedium3 marks
Explain the changes that occur in the blood vessels in the skin in a cold environment.
Answer
0 words
6(c)Homeostasis Negative FeedbackEasy1 mark
The control of internal body temperature is an example of homeostatic control by negative feedback.
State the name of one other example of homeostatic control.