A drug designed to stop neurons from recharging would block the step in which ions
A. are actively pumped against their concentration gradient.
B. spontaneously move down their concentration gradient.
C. spontaneously move against their concentration gradient.
D. are actively pumped down their concentration gradient.
E. are in the resting potential state.
A. are actively pumped against their concentration gradient.
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Archaea genomes contain introns
Indicate whether the statement is true or false.
In the mammalian heart, the systemic and pulmonary circuits ____
a. carry only oxygenated and deoxygenated blood, respectively b. carry only deoxygenated and oxygenated blood, respectively c. mix during times of stress d. intermix freely e. are completely separate
The classic work of Friedrich Wöhler (1828) that united the fields of biology and chemistry was based on the
A) discovery of yeast ferments. B) production of urea in the laboratory. C) discovery of ATP. D) identification of nucleotide bases. E) analysis of gene segregation.
As the endosperm matures it swells and eventually becomes the fruit.
Answer the following statement true (T) or false (F)