All of the following conditions will cause an increase in the circulating levels of carbon dioxide in the blood, EXCEPT:
A) lactic acidosis.
B) increased metabolism.
C) anaerobic metabolism.
D) acute hyperventilation.
Ans: D) acute hyperventilation.
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What causes the opening and closing of the heart valves?
A. The action of the papillary muscles and chordae tendineae B. A pressure difference on the two sides of the valve C. Turbulent flow in the atria and ventricles D. Na+ and K+ fluxes during ventricular depolarization E. Stimulation by the sympathetic and parasympathetic nerves
Which of the following structures in the inner ear transmits sound?
A. Bony labyrinth B. Semicircular canal C. Vestibule D. Cochlea
In the diagram shown below, where is the apical surface of the epithelial cell?
a) A b) B c) C d) D e) E
The deepest muscle of the abdominal wall is the ________.
A. rectus abdominis B. internal oblique C. pectoralis minor D. latissimus dorsi E. transverse abdominal