If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20% oxygen, 0.04% carbon dioxide, 75% nitrogen, and 5% water vapor, then the partial pressure of oxygen would be ________.
A. 200 mm Hg
B. 148 mm Hg
C. 20 mm Hg
D. 152 mm Hg
E. 740 mm Hg
Answer: D
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Which of the following is true of the subarachnoid space?
A. It contains cerebrospinal fluid, which cushions and nourishes the neurons of the spinal cord. B. It contains blood, which brings oxygen to the spinal cord neurons. C. It is attached to the outer edge of the spinal cord. D. It lies between the dura mater and the arachnoid mater. E. None of these is true of the subarachnoid space.
The additive effects of growth hormone (GH) and glucocorticoids illustrate the __________.
a. integrative effect b. permissive effect c. synergistic effect d. antagonist effect
The branch of the trigeminal nerve that has a somatic motor component is the:
a. opthalmic nerve b. mandibular nerve c. maxillary nerve d. hypoglossal nerve
Muscle fibers are bundled into groups known as
A) myotendrils. B) endomysium. C) myosin. D) fascicles.