Indicate the maximum number of electrons that can occupy each of the first three energy levels of an atom
A) 1, 4, 8
B) 1, 2, 4
C) 2, 4, 8
D) 2, 8, 8
E) 2, 8, 16
Answer: D
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The Greater the Concentration Difference of a Substance Between Two Solutions Separated by a Permeable Membrane, the Lesser the Magnitude of the Net Flux of the Substance.
Answer the following statement true (T) or false (F)
The descending __________ tract carries signals for precise, coordinated limb movements.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a function of the Sertoli cells?
a. secreting seminiferous tubule fluid b. phagocytizing cytoplasm extruded from developing sperm and destroy defective sperm c. secreting testosterone d. secreting inhibin e. providing nourishment for developing sperm
Which cells of the pancreas produce insulin?
A) chief cells B) beta cells C) alpha cells D) acinar cells