Regulation of Body Temperature – Thermoregulation (Grade 12 NSC Matric Life Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What is thermoregulation?
What is thermoregulation?
Process controlling internal core temp
What is the normal human body temperature?
What is the normal human body temperature?
Approximately 36.8°C
Which thermoreceptors in the skin detect heat?
Which thermoreceptors in the skin detect heat?
Ruffini's corpuscles
Which part of the brain acts as the temperature control centre?
Which part of the brain acts as the temperature control centre?
Hypothalamus
What happens to blood vessels near the skin surface when the environment is hot?
What happens to blood vessels near the skin surface when the environment is hot?
Vasodilation occurs - they widen
What happens to blood vessels near the skin surface when the environment is cold?
What happens to blood vessels near the skin surface when the environment is cold?
Vasoconstriction occurs - they narrow
Which two hormones are released to increase metabolic rate in cold conditions?
Which two hormones are released to increase metabolic rate in cold conditions?
Adrenalin and thyroxin
Which method of heat loss involves sweat turning from liquid to vapour?
Which method of heat loss involves sweat turning from liquid to vapour?
Evaporation
What happens when body temperature drops below 36°C?
What happens when body temperature drops below 36°C?
Metabolic processes slow down significantly
What does it mean that humans are endothermic organisms?
What does it mean that humans are endothermic organisms?
Can maintain constant body temp internally