1. During inspiration the pressure within the mediastinal
c. remains the same.
2. During expiration the intrapulmonic pressure:
c. goes bonkers.
3. Return of blood to the right atrium is assisted when:
a. the thorax is expanded (intrapleural pressure decreased
from normal) during inspiration.
b. the thorax is contracted (intrapleural pressure returned
to normal) during expiration.
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