When the thick and thin filaments slide past each other, which of the following is TRUE?
A) The Z disk to Z disk unit moves apart.
B) The myofibril doubles in size.
C) The muscle loses tone.
D) The sarcomere gets shorter.
Answer: D) The sarcomere gets shorter.
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If PO2 increases
A) saturation goes down and hemoglobin gives away oxygen. B) hemoglobin stores oxygen. C) hemoglobin gives away oxygen. D) saturation goes up. E) saturation goes up and hemoglobin stores oxygen.
The number of neutrons in an atom can be determined by
A. subtracting the atomic number from the atomic mass.?B. subtracting the atomic mass from the atomic number.?C. adding the atomic mass to the atomic number.?D. adding the number of protons to the number of electrons.?E. adding the number of protons to the atomic number.
Compartmentation refers to
A) pairing together isozymes that perform similar reactions. B) dividing metabolic reactions into groups for better understanding. C) separating substrates into chemical classes. D) grouping related enzymes into specific organelles.
For inspiration to occur, barometric pressure must be __________ alveolar pressure.
A) greater than B) less than C) equal to