Following severe loss of blood, how long does it take for red blood cells to be replaced?
a. a few hours
b. at least 1 day
c. at least 1 week
d. at least 1 month
e. about 45 days
c
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The uvula is located at the
A) posterior of the tongue. B) margin of the vestibule. C) base of a tooth. D) posterior margin of the soft palate. E) margin of the oropharynx and the laryngopharynx.
Smooth muscle contractions help to propel sperm cells in the ________.
A. seminiferous tubule B. seminal receptacle C. rete testis D. ejaculatory duct E. ductus deferens
Describe the contents and the structure of the nucleus
What will be an ideal response?
Choose the correct statement regarding the structure of the plasma membrane.
A. The hydrophobic center of the plasma membrane will restrict the movement of fat-soluble substances through the membrane. B. The membrane is composed of water-soluble molecules, to allow movement of water between the fluid compartments. C. The movement of proteins in the plasma membrane allows for cellular adaptations to the extracellular environment. D. Carbohydrates in the plasma membrane can serve as a source of immediate energy for the cell.