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 body temperature do humans maintain?
What constant body temperature do humans maintain?
What is transpiration?
What is transpiration?
Loss of water vapour from aerial plant parts
What are ectotherms?
What are ectotherms?
Animals unable to maintain constant 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 maintaining constant body temp.
Which animals are examples of endotherms?
Which animals are examples of endotherms?
Mammals and birds
What is the main source of heat for endotherms?
What is the main source of heat for endotherms?
Metabolic reactions
What hormone controls metabolic reactions in endotherms?
What hormone controls metabolic reactions in endotherms?
Thyroxine
What is vasodilation?
What is vasodilation?
Blood vessels widen to increase heat loss
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 have high energy demands