Exam 36: Ventilation

The Hering-Breuer reflexes are activated by stretch receptors in the lungs that send messages to the inspiratory center.

The amount of air left in the lung after a normal expiration is called:

Match each type of breathing with its corresponding definition. -An increase in pulmonary ventilation in excess of the need for oxygen

Cerebral impulses are a more powerful regulator of respirations than the carbon dioxide content of the blood.

A relatively small rise in arterial carbon dioxide partial pressure stimulates an increase in breathing rate.

Which of the following is not a regulated process associated with the functioning of the respiratory system?

A large amount of physiological dead air space would indicate an abnormal condition in the respiratory system.

Internal respiration and cellular respiration refer to the same thing.

The pressure between the visceral pleura and parietal pleura must always be positive to ensure the lung can expand.

Explain the terms ventilation and perfusion. Explain how they must work together to allow efficient gas exchange in the lung.

Standard atmospheric pressure is _____ mm Hg.

A well-perfused but poorly ventilated part of the lung wastes blood.

Which muscle is used in quiet expiration?

A pulmonary volume is the sum of two or more pulmonary capacities.

The apneustic center is located in the medulla of the brain.

Match each type of breathing with its corresponding definition. -Temporary cessation of breathing at the end of a normal expiration

Excessive fluid in the pleural cavity would be most likely to cause:

Compliance is the ability of the lungs and thorax to stretch.

Steve used a spirometer to analyze his respiratory capacities. He found the following results: A. After normal inspiration, a normal expiration was 500 ml. B. After a normal expiration, he was able to expel an additional 1000 ml. C. Taking as deep a breath as possible, then forcefully exhaling all the air possible, he yielded an output of 4500 ml. Based on the outcome of these measurements, what is Steve's inspiratory reserve?

If a person's total minute volume is 7500 ml and the volume of air in one breathing cycle is 500 ml, the breathing rate must be 20 cycles per minute.