The vasomotor center is an important regulator of ________ and is located in the ________.
A. visual reflexes; pons
B. visual reflexes; midbrain
C. voluntary movement; frontal lobe
D. blood pressure; pons
E. blood pressure; medulla oblongata.
Answer: E
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Which of the following does NOT cause vasodilation?
A) Increased carbon dioxide B) Increased nitrogen C) Increased hydrogen D) Increased nitric oxide
The trachea allows for the passage of large masses of food through the esophagus due to:
The size of the trachea the elasticity of the ringed tracheal cartilages distortion of the esophageal wall the C-shaped tracheal cartilages none of the choices are correct
In the sodium-hydrogen antiport system,
A. both Na+ and H+ are transported into the tubular cell. B. Na+ are transported into the cell; H+ are transported out of the cell. C. Na+ are transported out of the cell; H+ are transported into the cell. D. Na+ are transported into the tubular lumen; H+ are transported into the cell. E. both Na+ and H+ are transported into the tubular lumen.
What is the haploid number of chromosomes in human cells?
A. 23 B. 46 C. 22 pairs D. 23 pairs