Thorax and lungs II

During external gas exchange, oxygen and carbon dioxid diffusion occurs in the:

• venules.

• alveoli.

• red blood cells.

• body tissues.

When oxygen passes through the alveoli into the bloodstream, it binds with hemoglobin to form:

• red blood cells.

• carbon dioxide.

• nitrogen.

• oxyhemoglobin.

Principal muscle that participate in the action of breath

• Intercostal

• Diaphragm

• Pectoral muscles

• Scalene Muscle

Atmospheric pressure in Mexico City

• 760 mmhg

• 780 mmhg

• 1025 mmhg

• 500 mmhg

Tidal volume normal value

• 3000 ml

• 500 ml

• 1000 ml

• 1100 ml

Total lung capacity is the result of:

• Residual volume + Expiratory volume

• The sum of all volumes

• Tidal volume + inspiratory reserve volume

• Expiratory volume + tidal volume

What is the process that corresponds to internal respiration?

• Ventilation

• Pulmonary perfusion

   

• Diffusion

• Expiration

Where is the pneumotaxic center?

• Pons

• Midbrain

• Medulla oblongata

• Brain

pH value corresponding to acidosis

• 7.45

• 7.35

• 7.20

• 7.50

pH value corresponding to alkalosis

• 7.45

• 7.35

• 7.20

• 7.50