Respiratory System Functions Review

What is the primary function of the alveoli in the lungs?

• To transport oxygen to the bloodstream

• To produce mucus that traps pathogens

• To facilitate the exchange of oxygen and carbon dioxide

• To warm and humidify the air before it reaches the lungs

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How does the diaphragm contribute to the process of inhalation?

• By contracting and moving upwards

• By relaxing and moving downwards

• By contracting and moving downwards

• By relaxing and moving upwards

Why is the respiratory system considered crucial for maintaining homeostasis in the body?

• It regulates body temperature through sweating

• It controls the body's pH level by regulating the amount of carbon dioxide in the blood

• It eliminates waste products through the kidneys

• It provides nutrients to body tissues

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What happens to the pressure inside the thoracic cavity during inhalation?

• It increases significantly

• It remains constant

• It decreases

• It fluctuates rapidly

Which gas is expelled from the body during exhalation?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

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What role does the diaphragm play during exhalation?

• It contracts vigorously

• It relaxes and moves upwards

• It remains stationary

• It expands the ribcage

How do the alveoli adapt to maximize gas exchange?

• By decreasing their surface area

• By increasing their thickness

• By increasing their surface area

• By producing mucus

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What is the significance of the partial pressure gradient in the alveoli?

• It prevents gas exchange

• It facilitates the diffusion of gases

• It equalizes oxygen levels in the blood and alveoli

• It increases the viscosity of blood

In what way does the respiratory system interact with the circulatory system to maintain homeostasis?

• By circulating white blood cells

• By transporting oxygen to tissues and removing carbon dioxide

• By regulating blood pressure

• By synthesizing plasma proteins

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What is the effect of carbon dioxide accumulation in the blood on the pH level?

• It causes the pH to increase, becoming more alkaline

• It causes the pH to decrease, becoming more acidic

• It has no effect on the pH level

• It causes the pH to fluctuate unpredictably

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