Describe the structural organization of the nucleus of a cell
What will be an ideal response?
The nucleus of a cell has three recognizable regions or structures: the nuclear envelope (membrane), nucleolus, and chromatin. The nuclear envelope forms a boundary, is a double membrane with pores, and surrounds the nucleoplasm. The nucleus also contains one or more nucleoli, sites where ribosomes are assembled. When cell division is not occurring, DNA is wound around proteins (histones) to form chromatin, which is scattered throughout the nucleus.
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Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?
A. Fast B. Intermediate C. Slow
Match the appropriate characteristic with the type of immunity.A. Innate immunityB. Antibody-mediated immunityC. Cell-mediated immunityD. Both antibody-mediated and cell-mediated immunityE. Innate immunity, antibody-mediated immunity, and cell-mediated immunityAbility to resist damage from foreign substances such as microorganisms and harmful chemicals
Fill in the blank(s) with the appropriate word(s).
When a person receives intravenous fluids to help build up blood volume, why is it important for the fluid to be isotonic?
What will be an ideal response?
Mastication
A. increases the surface area of food particles. B. decreases the efficiency of digestion. C. occurs in both the mouth and stomach. D. is never under voluntary control. E. decreases the surface area of food particles.