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Physiology Wk 12Quiz
Question | Answer |
---|---|
Which muscles are used for forced expiration? | Abdominal muscles and internal intercostals |
Which of the following is not a means of transporting oxygen in the blood? | Combined with the bicarbonate ion (HCO3–) |
Which of the following would have the greatest accelerating effect on the dissociation of oxygen from hemoglobin? | Decreased PO2 and increased PCO2 |
Which type of breathing is characterized by repeated sequences of deep gasps and apnea, and is usually seen in people with increased intracranial pressure? | Biot's Breathing |
Which of the following is not a regulated process associated with the functioning of the respiratory system? | Control of the cell metabolism rate |
By the time the blood leaves the lung capillaries to return to the heart, what percentage of the blood’s hemoglobin has united with oxygen? | 97% |
During inspiration, the expansion of the lungs causes: | a decrease in alveolar pressure |
The approximate partial pressure of oxygen at standard atmospheric pressure is about _____ mm Hg. | 160 |
Excessive fluid in the pleural cavity would be most likely to cause: | decreased vital capacity |
If the tidal volume of a given individual is 500 ml, then the anatomical dead space is approximately _____ ml. | 150 |
One hundred milliliters of arterial blood contains approximately what volume percent of oxygen? | 20% |
Standard atmospheric pressure is _____ mm Hg. | 760 |
A drop in the body’s production of carbonic anhydrase would hinder the formation of: | carbonic acid |
Vital capacity is defined as the: | maximum volume of air that can be moved into and out of the lungs during forced respiration. |
Which of the following helps determine the amount of oxygen that diffuses into the blood each minute? | The total functional surface area of the respiratory membrane, alveolar ventilation, The oxygen pressure gradient between alveolar air and incoming pulmonary blood. (all) |
The symbol HbNCOOH– is used for: | carbaminohemoglobin. |
The vital capacity is equal to the sum of the: | inspiratory reserve volume, tidal volume, and expiratory reserve volume. |
Carbon dioxide is carried in three forms in the blood. Ranking them from greatest to least amount carried, the sequence would be: | bicarbonate ion, carbaminohemoglobin, and dissolved in plasma. |
The term used to describe the volume of air exchanged during normal inspiration and expiration is: | tidal volume |
About 98.5% of the oxygen carried by systemic arterial blood is attached to: | hemoglobin |
Boyle’s law states that the volume of a gas varies _____ with pressure at a _____ temperature. | inversely; constant |
When the pressure in the lung is greater than atmospheric pressure: | expiration occurs |
Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture. | directly related to the concentration of that gas in the mixture and |
If a person were skiing high up in the mountains, she might feel that she is having trouble breathing (getting enough oxygen in her blood). This is because the: | lower atmospheric pressure lowers the PO2 and the diffusion gradient between the blood and the atmosphere is less. |
The PCO2 in the atmosphere is: | less than in the alveolar air. |
Normal, quiet breathing is known as: | eupnea |
The major form by which carbon dioxide is transported in the circulatory system is: | as bicarbonate ions. |
A type of breathing characterized by gradually increasing tidal volume for several breaths followed by several breaths with gradually decreasing tidal volume is: | Cheyne-Stokes respiration. |
The PCO2 in alveolar air is _____ blood. | less than in the systemic venous and equal to the systemic arterial |
Which of the following constitutes total lung volume? | Residual volume and vital capacity |