QUESTION: 29

During exercise, a subject's oxygen consumption increases out of proportion to his cardiac output. This is due to an increase in

Anaerobic metabolism
Alveolar ventilation
Coronary blood flow
Oxygen extraction.

Answer(s): C

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QUESTION: 30

The following results were obtained from spirometry before and after a bronchodilator administration:

Which of the following is the correct interpretation of these data?

Restrictive pattern with positive bronchodilator response
Restrictive pattern with no bronchodilator response
Obstructive pattern with positive bronchodilator response
Obstructive pattern with no bronchodilator response

Answer(s): B

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A patient will undergo bronchial provocation testing with methacholine chloride (Provocholine). Baseline spirometry reveals the FVC is 4.00 L and FEV1is 3.00L.
The provocative dose 20% (PD20) can be calculated when which of the following measurements occur?

The FVC falls below 3.20 L, or the FEV1falls below 2.40L.
The FEV, falls below 2.40 L, regardless of change in FVC.
The FVC falls below 3.20 L and the FEV1falls below 2.40 L.
The ratio FEV1/FVC falls below 0.8.

Answer(s): B

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QUESTION: 32

While assessing a patient's expired gases at rest prior to exercise, a pulmonary function technologist calculates the RER as 0.6. Which of the following is the most likely explanation?

The patient has an elevated VDAVT
A gas analyzer is malfunctioning
The expired gas is contaminated with air
The patient is hyperventilating

Answer(s): B

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QUESTION: 29

QUESTION: 30

QUESTION: 31

QUESTION: 32