Why is it necessary to space grid marks on a graph proportionally to the quantity measured (example: each square represents one centimeter)?
What will be an ideal response?
If this is not done, a trend would be obscured or even misrepresented.
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The sodium level inside and outside of a resting cell is an example of the
A. kinetic energy of sodium rushing out of a cell down its concentration gradient. B. kinetic energy of the large difference in sodium concentration on the inside versus the outside of the cell. C. potential energy of a concentration gradient, because sodium is more abundant outside the cell. D. potential energy of an electron transport chain, because sodium has an extra electron to donate. E. conversion of potential energy to kinetic energy, because sodium can never move across the cell membrane and must move across its surface.
Identify the three major types of T cells activated by class I MHC proteins
A) plasma T cells, memory T cells, and cytotoxic T cells B) cytotoxic T cells, memory T cells, and regulatory T cells C) memory T cells, regulatory T cells, and plasma T cells D) NK T cells, cytotoxic T cells, and helper T cells E) helper T cells, regulatory T cells, and memory T cells
Which of the following statements regarding phagocytosis is TRUE?
A. Macrophages are the only phagocytes in the tissues. B. The microbe engulfed by the phagocyte is killed by lysosomal enzymes and hydrogen peroxide. C. Phagocytosis is controlled by a negative feedback mechanism whereby phagocytes release chemicals that inhibit further phagocytosis. D. The microbe engulfed by the phagocyte is killed by the membrane attack complex (MAC). E. Antibodies found inside lysosomes attack and kill microbes that are engulfed by phagocytosis.
What structure forms the roof of the mouth?
A. mesonephros B. mandibular processes C. neural tube D. secondary palate E. somites