What changes occur in the body when you are too hot? (5 marks)

1.     Hypothalamus is thermoregulatory centre in brain. This detects increase in temperature (above 37 degrees Celsius) and is activated.2.    Hypothalamus causes vasodilation of skin capillaries, which causes heat loss by radiation through the skin3.    Hypothalamus causes relaxation of erector muscle. This causes hair to lie flat, so skin can cool4.    Hypothalamus stimulates sweat glands to secrete sweat, which causes heat loss by evaporation of sweat from the skin5.    This process is an example of negative feedback 

Answered by Kendra-Jean N. Biology tutor

2599 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Describe how plants react to the environmental factor of Light


What is active transport?


Carbon Dioxide and water are needed for photosynthesis. Write a balanced symbol equation for photosynthesis.


How are living organisms involved in the cycling of carbon?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences