Author: Anonymous

The partial pressure of oxygen at sea level is approximately 159 mm Hg, and it increases when one goes to a higher altitude.

Expiration (also called exhalation) is usually a passive process at rest.

Which means: You (informal) are nervous.

Pulmonary diffusion is the process by which a person moves air into and out of the lungs.

Choose the correct form of estar + the present participle of the verb in parentheses to compete the sentence. 4. Miguel y Elena ___________ (vivir) en un apartamento en la playa.

Antes de ir de vacaciones, hay que ________.

The oxyhemoglobin dissociation curve is a depiction of the relationship between partial pressure of oxygen and the degree of oxygen unloading from hemoglobin.

Choose the correct form of estar + the present participle of the verb in parentheses to compete the sentence. 5. El amigo de Antonio __________ (trabajar) en la oficina hoy.

¿Qué necesitas para viajar a otro país?

Choose the best answer that completes the sentence. La biblioteca está __________ los domingos por la noche.