Which one of the following blood vessels carries oxygenated blood?
A) superior vena cava
B) inferior vena cava
C) coronary sinus
D) pulmonary artery
E) pulmonary vein
E
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Which of the following descriptions best fits the acid-base disorder respiratory acidosis?
A) consequence of hyperventilation (for example, in fever or mental illness) B) consequence of prolonged vomiting C) consequence of reduced alveolar ventilation (for example, due to emphysema) D) consequence of tissue hypoxia (for example, in ischemic conditions) E) consequence of strenuous exercise
Which extrinsic eye muscle elevates the eye upward, as in looking up?
A) inferior rectus muscle B) medial rectus muscle C) inferior oblique muscle D) superior rectus muscle
A shift of the resting transmembrane potential toward 0 mV is called
A) depolarization. B) repolarization. C) hyperpolarization. D) non-polarization. E) hypopolarization.
The electrical properties of cells are the result of
A. ion concentration differences across the plasma membrane. B. receptor sites that are present on the plasma membrane. C. phosphorylation reactions within the cytoplasm. D. phospholipids in the cell membrane. E. None of these choices is correct.