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WorksheetsBack to Basics - The Respiratory System
Total questions: 10
Worksheet time: 6mins
Which of the following statements about respiration is CORRECT?
Inhalation is mostly passive
Exhalation is always passive
Exhalation is usually passive but can be active under stress
Inhalation is driven by an increase in airway pressure
Which of the following statements about the tracheobronchial tree is false?
The terminal bronchioles are the major site of gas exchange.
Most of the airways are lined by cilia.
Air in the bronchi contributes to anatomical dead space.
The bronchi are proximal to bronchioles.
Consider this Oxygen-Haemoglobin binding curve. Which of the following statements is FALSE?
Hb affinity for O2 is higher at higher [O2]
Hb affinity for O2 is greater in working muscle than lungs
High CO2 & H+ levels reduce the degree of Hb binding to O2
Hb-O2 binding is cooperative
A pulmonary embolism occurs when a blood clot gets lodged in the pulmonary circulation, blocking blood flow through a vessel. This can result in a V/Q mismatch due to a...
Reduction in V
Reduction in Q
Increase in V
Increase in Q
In regard to gas exchange, which of the following is true of Fick's Law?
Greater surface area = greater gas exchange
Thicker membrane = greater gas exchange
Higher solubility = less gas exchange
Greater pressure gradient = less gas exchange
Which of the following are likely causes and explanations of the Haemoglobin-Oxygen dissociative curve shifting to the RIGHT?
Decreased CO2 and H+, so the affinity of Hb for O2 increases.
Decreased CO2 and H+, so the affinity of Hb for O2 decreases.
Increased CO2 and H+, so the affinity of Hb for O2 increases.
Increased CO2 and H+, so the affinity of Hb for O2 decreases.
What is the main role of the diaphragm in respiration?
Contraction of the diaphragm decreases pressure in the thoracic cavity.
Contraction of the diaphragm moves abdominal organs away, making space for the lungs to expand.
Contraction of the diaphragm increases pressure in the thoracic cavity.
The diaphragm is the main accessory muscle of expiration.
The acid-base disturbance present is...
Respiratory acidosis
Respiratory alkalosis
Metabolic acidosis
Metabolic alkalosis
Which statement about the control of ventilation is TRUE?
Central chemoreceptors detect CO2 and O2 levels in the blood.
Respiration rate is regulated by the lungs.
Ventilation is controlled entirely by feedback from the autonomic nervous system.
Efferent signals arise from the medulla.
Cystic fibrosis is one of the most common inherited (genetic) conditions in Caucasian populations. Mutations in the CFTR gene lead to thick and sticky mucous. Which structure of the respiratory tract is most likely to be affected by this change?
Pleural membrane
Alveolar macrophages
Epithelial cells
Cilia
