Functions of Respiratory System

What is the primary site of gas exchange in the human respiratory system?

• Trachea

• Alveoli

• Bronchi

• Larynx

Which gas is primarily transported from the lungs to the bloodstream during inhalation?

• Carbon dioxide

• Nitrogen

• Oxygen

• Helium

During exhalation, the diaphragm:

• Contracts and moves upwards

• Relaxes and moves upwards

• Contracts and moves downwards

• Relaxes and moves downwards

What is the term for the maximum amount of air a person can expel from the lungs after a maximum inhalation?

• Tidal volume

• Residual volume

• Vital capacity

• Inspiratory reserve volume

What is the primary muscle involved in the process of inhalation?

• Intercostal muscles

• Abdominal muscles

• Diaphragm

• Pectoral muscles

Which of the following best describes the process of gas exchange in the alveoli?

• Active transport

• Osmosis

• Diffusion

• Filtration

What is the role of the chemoreceptors in the control of breathing?

• Detect changes in blood pressure

• Detect changes in blood pH and gas levels

• Detect changes in body temperature

• Detect changes in heart rate

Which of the following statements about the respiratory system is true?

• The left lung is larger than the right lung

• The trachea is also known as the windpipe

• The bronchioles are the largest air passages in the lungs

• The larynx is located below the trachea

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

• It increases

• It decreases

• It remains the same

• It fluctuates

Which of the following lung volumes cannot be directly measured using a spirometer?

• Tidal volume

• Residual volume

• Inspiratory reserve volume

• Expiratory reserve volume