4.5.2 The human nervous system (will come up) P2 Flashcards
1
Q
How is temperature monitored by the body
A
Thermoregulatory centre has receptors sensitive to blood temperature
Skin has receptors sensitive to skin temperature - sends impulses to thermoregulatory centre
2
Q
What physiological changes occur when the body temperature is too high
A
Vasodilation - blood vessels near the surface of the skin dilate - more heat is radiated away
Sweating - evaporation of water takes away heat energy from the surface of the skin
3
Q
What physiological changes occur when the body temperature is too low
A
Vasoconstriction - blood vessels near the surface of the skin constrict - less heat radiated away
Shivering - respiration allows muscles to contract. It is an exothermic process, so heat energy is released
Sweating stops
