GCSF 2013 UNIT 5.2

What is the primary muscle responsible for inhalation?

• Diaphragm

• Abdominal muscles

• Quadriceps

• Biceps

During exhalation, what happens to the diaphragm?

• The diaphragm relaxes and moves upwards.

• The diaphragm contracts and moves downwards

• The diaphragm remains stationary

• The diaphragm expands and moves sideways

Where does gas exchange occur in internal respiration?

• Bronchi

• Kidneys

• Alveoli of the lungs

• Stomach

Which lung volume represents the maximum amount of air that can be inhaled after a normal tidal volume inhalation?

• Inspiratory Reserve Volume (IRV)

• Residual Volume (RV)

• Vital Capacity (VC)

• Expiratory Reserve Volume (ERV)

What is the process of exchanging oxygen and carbon dioxide between the alveoli and the blood vessels in the lungs called?

• Gas exchange

• Gas transfer

• Alveolar diffusion

• Respiratory exchange

Which lung volume remains in the lungs even after a forced exhalation?

• Residual volume

• Vital capacity

• Inspiratory reserve volume

• Expiratory reserve volume

What is the role of the intercostal muscles during inhalation?

• The intercostal muscles contract to decrease rib cage size.

• The intercostal muscles relax to decrease thoracic cavity volume.

• The intercostal muscles have no role during inhalation.

• The intercostal muscles contract to expand the rib cage and increase thoracic cavity volume.

What drives the process of exhalation?

• Expansion of the lungs

• Activation of the vocal cords

• Contraction of the diaphragm and intercostal muscles

• Relaxation of the diaphragm and intercostal muscles

In internal respiration, where does oxygen move from and to?

• From the brain to the alveoli in the lungs

• From the bloodstream to the alveoli in the lungs

• From the alveoli in the lungs to the heart

• From the alveoli in the lungs to the bloodstream

Which lung volume represents the amount of air that can be forcefully exhaled after a normal tidal volume exhalation?

• Inspiratory Reserve Volume (IRV)

• Vital Capacity (VC)

• Residual Volume (RV)

• Expiratory Reserve Volume (ERV)