The partial pressure of oxygen that stimulates the respiratory areas is ________ of normal.
A. 50%
B. 67%
C. 80%
D. 33%
Answer: A
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Which of the following is used to promote water reabsorption by the kidneys?
a) Antidiuretic hormone b) ANP c) Aldosterone d) Parathyroid hormone e) All of these choices
A DNA base sequence is A T G C C G. The sequence of bases in a strand of mRNA transcribed from this sequence of bases in DNA would be
A. T A G G G G. B. T A C G G C. C. A U G C C G. D. U A C G G C. E. U T C G G U.
The direction from which a sound is coming can be determined by the
A. differences in the time that sound waves take to reach each ear. B. amplitude of the sound waves. C. volume of the sound. D. timbre of sounds. E. frequency of sound waves.
White rami appear white in color due to the fact that they are ________.
Fill in the blank(s) with the appropriate word(s).