A piece of the ____________________ acts as a flap at the level of the foramen ovale and controls the blood flow between the two atria.
When a partial pressure gradient exists for a gas, it will…
When a partial pressure gradient exists for a gas, it will move from the area of its LOWER partial pressure to the area of HIGHER partial pressure.
The key anatomic features of the respiratory membrane that…
The key anatomic features of the respiratory membrane that make alveolar gas exchange so efficient are….
(MAYBE TOUGH, only 1pt) An increase in the partial press…
(MAYBE TOUGH, only 1pt) An increase in the partial pressure of CO2 causes bronchioles to….
The lungs remain inflated because…
The lungs remain inflated because…
Foreign particles…..
Foreign particles…..
In general, respiratory zone structures are lined with a t…
In general, respiratory zone structures are lined with a thicker mucosa than conducting zone structures.
Which of the following is considered a PRIMARY (not second…
Which of the following is considered a PRIMARY (not secondary) lymphoid organ?
Bronchoconstriction results from relaxation of smooth musc…
Bronchoconstriction results from relaxation of smooth muscle in the walls of airways.
Which of the following features is not common to both lymp…
Which of the following features is not common to both lymphatic vessels and circulatory veins?