Respiratory system

Which of the following is NOT a function of the respiratory system?

• Gas exchange

• Blood pressure regulation

• Platelet production

• Digestion

Which respiratory zone of the respiratory system consists of alveoli and other gas exchange regions?

• Conducting zone

• Lower respiratory tract

• Upper respiratory tract

• Respiratory zone

Which of the following is NOT a function of the brainstem respiratory centers?

• Control of voluntary breathing

• Automatic breathing regulation

• Modifying the rate and depth of breathing

• Controlling breathing in response to sleep, exercise, and emotional responses

Central chemoreceptors in the brainstem respond primarily to changes in the pH of:

• Blood

• Cerebrospinal fluid

• Alveolar air

• Lymph

Which respiratory reflex is triggered by excessive inflation and inhibits inspiratory neurons to stop inspiration?

• Hering-Breuer reflex

• Stretch reflex

• Irritant reflex

• Peripheral chemoreceptor reflex

What is the primary gas exchanged between alveolar air and blood during alveolar gas exchange?

• Nitrogen

• Carbon dioxide

• Oxygen

• Argon

What is the main factor influencing the rate of oxygen unloading from hemoglobin to match metabolic needs in tissues?

• Ambient temperature

• Ambient partial pressure of oxygen

• pH of the tissue environment

• Presence of carbon monoxide

Which gas is known for its competitive inhibition with oxygen, leading to hypoxia in the body?

• Nitrogen

• Carbon dioxide

• Carbon monoxide

• Hydrogen sulfide

What is the primary consequence of oxygen toxicity when pure oxygen is breathed at high pressures?

• Retinal damage

• Lung cancer

• Nervous tissue damage

• Kidney failure

What is the term used to describe the deficiency of oxygen or the inability to use oxygen effectively in the body?

• Anoxia

• Cyanosis

• Ischemia

• Hypoxia