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30 Cards in this Set

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  • Back
The physiological term for breathing.
Pulmonary Ventilation
How much volume of air is moved in and out of the lungs during normal, quiet breathing?
500 ml
The amount of air that can be forcefully inhaled after a normal tidal volume inhalation (2800 ml).
Inspiratory Reserve Volume
The process by which air is taken into the lungs.
Inspiration
TV + IRV + ERV = (4800) ml.
Vital Capacity (VC)
An inspiratory muscle.
Diaphragm
The apparatus used to measure respiratory volume.
Spirometer
Sounds produced by air rushing through the trachea and bronchi.
Bronchial sounds
What is the normal pH of arterial blood (+/- 0.02)?
7.4
When carbon dioxide enters red blood cells and combines with water, what is formed?
Carbonic Acid
Air and food are routed in to the proper channels by the
Larynx
The loudness of a person's voice depends on
The force with which air rushes across the vocal folds
The smallest macroscopic subdivision of the lung is the
Lobule
The pleurae are vital to the integrity of the lungs because
They produce a lubricating serous secretion, allowing the lungs to glide over the thorax wall during breathing
Surfactant helps to prevent the alveoli from collapsing by
Interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid
For gas exchange to be efficient, the respiratory membrane must be
0.5 to 1 micrometer thick
The most powerful respiratory stimulus for breathing in a healthy person is:
Increase of carbon dioxide
In the plasma, the quantity of oxygen in solution is:
Only about 1.5% of the oxygen carried in dissolved form
Which of the following changes occurs as the conducting tubes of the lungs become smaller?
Smooth muscle amount increases
The ideal vital capacity of an individual is around:
4800
Which of the following provide the greatest surface area for gas exchange?
Alveoli
The respiratory membrane is a combination of:
Alveolar and capillary walls and their fused basal lamina
A gas emboli may occur because:
A diver holds his breath upon ascent
Inspiratory capacity is:
The total amount of air that can be inspired after a tidal expiration
Which of the following statements is true regarding the respiratory rate of a newborn?
The respiratory rate of a newborn is, at its highest rate, approximately 40-80 respirations per minute
The factors responsible for holding the lungs to the thorax wall are:
Surface tension from pleural fluid, positive pressure, and atmospheric pressure on the thorax
Which of the following is not possible?
Pressure gradient equals gas flow over resistance
Select the correct statement about the physical factors influencing pulmonary ventilation
As alveolar surface tension increases, additional muscle action will be required
The erythrocyte count increases after a while when an individual goes form a low to a high altitude because:
The concentration of oxygen and/or total atmospheric pressure is lower at high altitudes
Select the correct statement about oxygen transport in blood:
A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal