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47-3 Biology S.C
biology study cards "respriatory system"
| Question | Answer |
|---|---|
| Explain the relationship between the following pairs of terms: epiglottis, trachea | When food is swallowed, the epiglottis covers the trachea. During inspiration, the epiglottis allows air to pass into the trachea |
| Explain the relationship between the following pairs of terms: expiration, larynx | Vocal sounds are produced when air is expired past the vocal chords in the larynx |
| Explain the relationship between the following pairs of terms: bronchi, bronchioles | The trachea branches into two bronchi, each of which leads to a lung. Bronchi branch into smaller tubes called bronchioles. |
| Explain the relationship between the following pairs of terms: alveoli, inspiration | Alveoli are filled with air during inspiration. |
| Cilia that line the walls of air passageways A. move the inspired air into the alveoli B. move the expired air to the nasal cavity C. moisten the expired air D. clean the inspired air | D- clean inspired air |
| The exchange of gasses that occurs at an alveolus depends on: A. elevated blood pressure B. mucus carrying dissolved oxygen C. concentration gradient D. bronchioles closing during expiration | C- concentration gradints |
| Carbon dioxide is transported in the blood A. bound to hemoglobin B. plasma C. as bicarbonate ions D. All of the above | D- all of the above |
| Inspiration occurs when A. the diaphragm pushes upward B. thoracic volume increases C. blood pressure increases D. thoracic pressure increases | B- thoracic volume increases |
| The rate of breathing is controlled by cells within A. a specialized node on the bronchus B. the diaphragm C. the brain D. stretch receptors located between the ribs | C- the brain |
| Is the nasal cavity a part of the respiratory system? Explain your answer | Yes; it conducts air between the external environment and the lungs |
| Describe the skeleton's involvement with expiration? | The ribs are important for expiration. The muscles between the ribs relax during expiration permitting the ribs to fall. As a result, the thoracic cavity decreases in volume. |
| CRITICAL THINKING: Oxygen deficiency is called hypoxia. Suggest two possible causes of inadequate delivery of oxygen to body tissues. | mpaired blood circulation, defective hemoglobin (sickle cell), damaged lungs, heart, or diaphragm (emphysema), fluid in the alveoli (pneumonia), and living at a very high altitude. |
| What drives the diffusion of oxygen and carbon dioxide in the lungs from a blood cell to an alveolus? | concentration gradients |
| In the lungs, is carbon dioxide more concentrated in the alveoli or in the blood? Explain your answer | CO2 is more concentrated in the blood. This causes CO2 to flow from the blood to the lungs and out of the body |
| Does the exchange of carbon dioxide depend on the concentration of oxygen in the alveoli and the blood? Explain your answer. | No; oxygen and CO2 each have a concentration gradient. Thus, exchange of one gas is independent of the other. |
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angelicaunpingco
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