Exchange Surfaces and Ventilation (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
Which feature is NOT present in insect gas exchange systems?
Which feature is NOT present in insect gas exchange systems?
Ample blood supply
What are bony fish with skeletons made of bone called?
What are bony fish with skeletons made of bone called?
Teleosts
What structures project from the gill arch in bony fish?
What structures project from the gill arch in bony fish?
Gill filaments
During fish inspiration, what happens when the buccal cavity floor lowers?
During fish inspiration, what happens when the buccal cavity floor lowers?
Pressure decreases, water flows in
In counter-current flow, which direction does blood flow relative to water?
In counter-current flow, which direction does blood flow relative to water?
Opposite direction
What % of oxygen can bony fish extract using counter-current flow?
What % of oxygen can bony fish extract using counter-current flow?
80-90%
Where are spiracles located in insects?
Where are spiracles located in insects?
Along each side of the abdomen
What material reinforces insect tracheae to prevent collapse?
What material reinforces insect tracheae to prevent collapse?
Chitin rings
What is the role of tracheal fluid at tracheole endings?
What is the role of tracheal fluid at tracheole endings?
Provides aqueous medium for O₂ to dissolve
How thick are mammalian alveolar walls typically?
How thick are mammalian alveolar walls typically?
0.2-0.5 micrometres