How would the removal of hydroxyapatite crystals from bone matrix affect the physical properties of a bone?
A) The bone would be less compressible. B) The bone would be more flexible.
C) The bone would be less flexible. D) The bone would be stronger.
Answer: B
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If the length of the absolute refractory period in cardiac muscle cells was the same as it is for skeletal muscle cells, ________
A) contractions would last as long as the refractory period B) tetanic contractions might occur, which would stop the heart's pumping action C) pacemaker cells would cease to spontaneously depolarize D) it would be much longer before cardiac cells could respond to a second stimulation
If your ocular lens is 10×, and you are using your 45× objective lens to view a slide, the total magnification is ________.
Fill in the blank(s) with the appropriate word(s).
Contractions of the heart generate blood pressure, which is responsible for moving blood through the blood vessels.
a. true b. false
What is the principal cation of the ECF?
A. K+ B. Cl- C. Pi D. Na+ E. Ca2+