What happens first following a neuronal stimulation?
A. Sodium ions enter the cell.
B. Sodium ions leave the cell.
C. Potassium ions enter the cell.
D. Potassium ions leave the cell.
E. Potassium ions are involved in positive feedback.
Answer: A
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Two boys survived 6 days at sea without drinking any fresh water. Their plasma antidiuretic hormone (ADH) levels should be ________
a. about the same as normal b. higher than normal c. zero after 6 days d. lower than normal
Which technique did Rosalind Franklin use to determine many aspects of DNA’s structure?
a. transformation b. transmission electron microscopy c. density-gradient centrifugation d. x-ray crystallography e. chromatography
Removal of which of the following lymphoid organs would be most detrimental to immune function in an infant?
What will be an ideal response?
One mechanism that may lead to novel disease treatment involves ________, which hinders the translation of specific mRNAs
A) siRNA B) tRNA C) P bodies D) macro-RNAs E) rRNA