Homeostasis (LC 2027) (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is homeostasis?
What is homeostasis?
Maintenance of constant internal environment
What constant temperature do humans maintain?
What constant temperature do humans maintain?
37°C
What is transpiration?
What is transpiration?
Loss of water vapour from aerial plant parts
What are ectotherms?
What are ectotherms?
Animals that cannot maintain constant internal temp.
Which of the following are examples of ectotherms?
Which of the following are examples of ectotherms?
Reptiles and insects
What are endotherms?
What are endotherms?
Animals that maintain constant body temp.
What is the main source of heat in endotherms?
What is the main source of heat in endotherms?
Metabolic reactions
Which hormone controls metabolic reactions in endotherms?
Which hormone controls metabolic reactions in endotherms?
Thyroxine
What is vasodilation?
What is vasodilation?
Blood vessels widen to increase heat loss
How does shivering help endotherms warm up?
How does shivering help endotherms warm up?
Skeletal muscles contract/relax, making heat
What is vasoconstriction?
What is vasoconstriction?
Blood vessels narrow, reducing heat loss
Why do endotherms eat more frequently than ectotherms?
Why do endotherms eat more frequently than ectotherms?
They need high energy to regulate temp.