Output from higher brain centers can bypass both the DRG and VRG and go directly to ________, which controls the accessory muscles of respiration
A) the vagus nerve B) the diaphragm
C) the cerebral cortex D) spinal integration centers
D
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What does label F represent?
A) complement binding site
B) antigen binding site
C) antigenic determinant sites
D) macrophage binding site
E) antibodies
When the ventricular walls contract,
A. the tricuspid valve opens and the mitral valve closes. B. the mitral and tricuspid valves open. C. the mitral valve opens and the tricuspid valve closes. D. the mitral and tricuspid valves close.
Systemic venous is ____ alveolar , and systemic venous is ____ alveolar
a. greater than, greater than b. greater than, less than c. less than, greater than d. less than, less than e. equal to, equal to
The work of breathing normally requires about 3% of total energy expenditure, this increases under all of the following situations except
a. when elastic recoil is decreased. b. when resistance goes up. c. when the partial pressure of oxygen decreases in the air. d. when ventilation must be increased. e. it increases with all of the above