A. More negative
B. Less negative
C. Positive
D. Equal to the intra alveolar pressure
Related Mcqs:
- Normal intrapleural pressure during the start of inspiration is _________ mm of Hg?
A. -2
B. -5
C. 0
D. -7 - The intrapleural pressure at the end of deep inspiration is ______________?
A. -4 mm Hg
B. +4 mm Hg
C. -18 mm Hg
D. + mm Hg - The cementuoenamel junction is approximately at the level at which the root canal becomes_____________?
A. Twisted
B. Curved
C. Pulp chamber
D. Lateral canal - During the initial part of inspiration, which of the following does not occur ?
A. Intrapulmonary pressure falls
B. Intra thoracic pressure rises
C. Intra-abdominal pressure rises
D. The partial pressure of O2 in dead space rises - Oral diaphragm is formed by_________________?
A. Mylohyoid muscle
B. Genioglossus muscle
C. Buccinator muscle
D. Orbicularis oris muscle - Limitation of inspiration by vagal lung inflation signals is called the______________?
A. Autonomic reflex
B. Bainbridge reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex - Cardiac muscle contracts due to______________?
A. Extracellular Ca+2
B. Sarcoplasmic ca+2
C. Extracellular Na+
D. Intracellular Na+ - Inadequate pressure application during flasking_______________?
A. Increases vertical dimension
B. Causes teeth to be shrunken in investment
C. Causes poor quality of colour
D. Causes fracture of denture - Increase in partial pressure of CO2 leading to release of oxygen to the tissues is________________?
A. Haldane effect
B. Bohr effect
C. Breur effect
D. Hamburger effect - Energy expenditure during normal breathing____________?
A. 25% – 50% of total energy spent
B. 50% -75% of total energy spent
C. 15% – 20% of total energy spent
D. 2% – 3% of total energy spent
