Respiratory System For Real!

Which one of the following best describes why humans can rarely survive more than a few minutes without breathing?

• Breathing fuels the processes that deliver fats, sugars, and proteins through the blood from the digestive system to the cells of the body.

• Breathing allows our bodies to use oxygen and remove carbon dioxide, both of which are necessary for essential cellular processes to continue.

• Oxygen ultimately drives the beating of the heart, which provides essential liquids and nutrients to the cells of the body.

• Breathing controls the homeostasis of temperature, water, and salt levels in the body, which is necessary for life.

• Oxygen is necessary for cells to be able to make the fats, sugars, and proteins necessary for the cells of the body to function.

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Ventilation refers to the process by which which one of the following occurs?

• Gases are exchanged between the cells and the lungs.

• Gases are exchanged between the air and the blood.

• Air moves into and out of the lungs.

• Gases are exchanged between the blood and the cells.

• ATPs are produced.

Breathing (ventilation) is directly facilitated by all of the following EXCEPT which one?

• Ribs

• Respiratory system

• Blood vessels

• Muscles

• Nerves

How does external respiration differ from internal respiration?

• External respiration is done only by some amphibians, which can exchange gases through their skin.

• External respiration refers to gas exchange between inhaled air and blood, whereas internal respiration refers to gas exchange between the blood and tissue fluids.

• External respiration involves gills, whereas internal respiration involves lungs.

• Internal respiration refers to gas exchange between inhaled air and blood, whereas external respiration refers to gas exchange between the blood and tissue fluids.

• External respiration refers to gas exchange, regardless of its location, whereas internal respiration refers to the cellular process that metabolizes glucose and results in the production of ATP.

Which of the following occurs as air is drawn through the nose?

• Water is removed, and the air becomes drier.

• Carbon dioxide is removed from the air and replaced with oxygen.

• Air is mixed with odorants to produce smells.

• Harmful allergens and other toxic materials such as cigarette smoke and asbestos are removed.

• Air is warmed, filtered, and humidified.

When air entering the respiratory tract leaves the pharynx, it next enters the which structure?

• Bronchioles

• Larynx

• Alveoli

• Bronchi

• Sinuses

During the ingestion of food or liquid, which one of the following blocks the opening to the trachea?

• Pharynx

• Bronchi

• Epiglottis

• Bronchioles

• Larynx

Arrange the following entries in the order in which air contacts them as air is drawn into the body. a. trachea b. bronchiole c. pharynx d. alveoli e. larynx

• c, e, b, a, d

• c, a, e, d, b

• d, a, c, e, b

• c, a, e, b, d

• c, e, a, b, d

Which of the following structures is the location of gas exchange between the inhaled air and the blood?

• Trachea

• Bronchioles

• Alveoli

• Bronchi

• Pleura

Which one of the following muscles separates the thoracic cavity from the abdominal cavity?

• Intercostal

• Intracostal

• Cardiac

• Diaphragm

• Spleen