1. Leaving Certificate Biology Breathing System 1 iQuiz SECOND Press the F5 Key to Begin, Then click on this Blue Box FIRST In PowerPoint 2007 if you see a Security Warning click HERE on Options… and then click on  Enable this content

2. The flap of tissue which covers the opening to the larynx and trachea and prevents food going ‘down the wrong way’ is called the … Epiglottis GlottisEpicotyl Epididymis

3. The lungs excrete … CO 2 & Salt H 2 O & SaltH 2 O & CO 2 H 2 O & Urea

4. Gas exchange in the lungs takes place in the … BronchiolesAlveolus NoseBlood

5. Which blood vessels carry deoxygenated blood towards the lungs? Pulmonary veinPulmonary artery AortaVena cava

6. Alveoli are surrounded by … ArteriesVeins ArteriolesCapillaries

7. The percentages of nitrogen, oxygen and carbon dioxide in exhaled air are respectively … 78-20-0.0378-16-3 78-20-320-78-0.03

8. What is the correct order for the passage of air through the following structures. 1- bronchi; 2 – larynx; 3 – trachea; 4 – nasal cavity; 5 – alveoli. 4-3-2-1-54-1-3-2-5 4-2-3-1-54-5-3-2-1

9. Which process does not occur in the nasal cavity? Trapping of foreign bodies Exchange of gases Humidification of air Warming of air

10. Ciliated cells are found lining the … Trachea Intercostal muscles OesophagusDiaphragm

11. Where is oxyhaemoglobin formed? TracheaDiaphragm LungsPleura

12. Which part of the breathing system is reinforced by cartilage? BronchiolesTrachea NoseAlveoli

13. An inflammatory condition affecting the bronchi, caused by bacteria, viruses and long-term exposure to irritants such as air pollutants and results in a build up of mucus in the bronchi is … Lung cancerAstigmatism AsthmaBronchitis

14. Name the substance in an inhaler, to widen the bronchioles, used by a person suffering from asthma. PenicillinBronchodilator BronchoinhalerSteroids

15. What is the normal rate of breathing per minute in humans? 70 – 751 – 2 16 – 1830 – 40

16. The ventilation centre in the brain controls the rate of breathing. In what part of the brain is it located? CerebellumMedulla oblongata CerebrumCorpus callosum

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