PASS BIOL125 Week 12

Which is true during inspiration during normal ventilation?

• Decreased resistance

  Increased flow

• Increased resistance

  Decreased flow

• Increased resistance

  Increased flow

• Decreased resistance

  Decreased flow

Which is true during expiration during normal ventilation?

• Decreased resistance

  Increased flow

• Increased resistance

  Decreased flow

• Increased resistance

  Increased flow

• Decreased resistance

  Decreased flow

In healthy individuals, airflow in the respiratory system can be described as:

• Turbulent

• Laminar

Which of the following would be expected to happen to ventilation in old age? Select all that apply:

• Decreased chest compliance associated with arthritic changes in the rib cage

• Decreased tolerance to exercise due to reduced oxygen intake

• Decreased lung compliance due to loss of elasticity

• Loss of alveolar surface area

Which of the following defines tidal volume?

• The amount of air that can be inhaled after normal inhalation

• The amount of air left in the lungs after the expiratory reserve is exhaled

• The reserve amount that can be exhaled after normal exhalation

• The amount of air inspired and expired after a normal breath

Why is residual volume important? Select all that apply:

• So that some air stays in the lungs so that lung tissue doesn't stick together

• It plays an important role in preventing hyperventilation

• It prevents large fluctuations in respiratory gases

• It allows us to cough after exhaling

Which of the following describes the ratio in spirometry that is typically used to diagnose lung disease?

• FVC/FEV1

• FEV1/FVC

• FVC/TLC

• FVC/FRC

How many heme subunits are there in haemoglobin?

• 1

• 2

• 3

• 4

After the first oxygen molecule binds to haemoglobin, oxygen affinity...

• Decreases

• Increases

• Remains unchanged

Which of the following are causes for hypercapnia? Select all that apply:

• Hyperventilation

• Hypoventilation

• Lung disease

• Administration of ventolin