BIO-202 HUMAN ANATOMY AND PHYSIOLOGY II FINAL

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BIO-202 HUMAN ANATOMY AND PHYSIOLOGY II FINAL

EXAM | BIO 202 FINAL EXAM LATEST ACTUAL EXAM WITH

200 QUESTIONS AND CORRECT ANSWERS, / TEST

BANK - GRAND CANYON UNIVERSITY

The main site of gas exchange is the ________.

• alveoli
• respiratory bronchiole
• alveolar duct
• alveolar sacs

The loudness of a person's voice depends on the ________.

• force with which air rushes across the vocal folds
• strength of the intrinsic laryngeal muscles
• length of the vocal folds
• thickness of vestibular folds

The walls of the alveoli are composed of two types of cells, type I and type II. The function of type II is to

________.

• protect the lungs from bacterial invasion
• secrete surfactant
• replace mucus in the alveoli
• trap dust and other debris
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Complete the following statement using the choices below. Air moves out of the lungs when the pressure inside the lungs is ________.

• equal to the pressure in the atmosphere
• greater than the pressure in the atmosphere
• greater than the intra- alveolar pressure
• less than the pressure in the atmosphere

Which of the following is true regarding normal quiet expiration of air?

• It is a passive process that depends on the recoil of elastic fibers that were

stretched during inspiration.

• It depends on the complete lack of surface tension on the alveolar wall.
• It is driven by increased blood CO2 levels.
• It requires contraction of abdominal wall muscles.

Which of the following maintains the patency (openness) of the trachea?

• pseudostratified ciliated epithelium
• Surface tension of water
• C- shaped cartilage rings
• surfactant production

Intrapulmonary pressure is the ________.

• pressure within the alveoli of the lungs
• negative pressure in the intrapleural space
• pressure within the pleural cavity 2 / 4

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• difference between atmospheric pressure and respiratory pressure

The relationship between gas pressure and gas volume is described by ________.

• Boyle's law
• Henry's law
• Dalton's law
• Charles' law

The statement, "in a mixture of gases, the total pressure is the sum of the individual partial pressures of gases in the mixture" paraphrases ________.

• Boyle's law
• Charles' law
• Dalton's law
• Henry's law

Surfactant helps to prevent the alveoli from collapsing by ________.

• warming the air before it enters
• protecting the surface of alveoli from dehydration and other environmental variations
• humidifying the air before it enters
• 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 ________. 3 / 4

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• The thickness of the respiratory membrane is not important in the efficiency of gas

exchange.

• Between 5 and 6 micrometers thick
• 0.5 to 1 micrometer thick
• At least 3 micrometers thick

With the Bohr effect, more oxygen is released because a(n) ________.

• increase in pH (alkalosis) strengthens the hemoglobin- oxygen bond
• decrease in pH (acidosis) strengthens the hemoglobin- oxygen bond
• decrease in pH (acidosis) weakens the hemoglobin- oxygen bond
• increase in pH (alkalosis) weakens the hemoglobin- oxygen bond

The most powerful respiratory stimulus for breathing in a healthy person is ________.

• loss of oxygen in tissues
• alkalosis
• increase of carbon dioxide
• acidosis

The local matching of blood flow with ventilation is ________.

• the Haldane effect
• Chloride shifting
• ventilation- perfusion coupling
• the Bohr effect

In the plasma, the quantity of oxygen in solution is ________.

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