During which one of the following phases of an action potential do the sodium channels close and potassium channels open, releasing potassium from the neuron?
A) depolarization
B) reestablishment of resting potential
C) saltatory propagation
D) both depolarization and repolarization
E) repolarization
E
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A moth flying toward a light is an example of ____ . A sowbug speeding up and making random turns in a warm, bright environment is an example of ____
Fill in the blank with the appropriate word.
The ____ regulates the movement of molecules in and out of the cell
a. nucleus b. cytoplasm c. cystol d. plasma membrane e. DNA
What important resource do Schwann cells and oligodendrocytes provide to neurons?
A. oxygen B. nutrients C. physical strength from microtubules D. Ca2+ currents E. insulating layers of membrane
Which of the following compounds has six carbon
atoms? a. phosphoglycerate (PGA) b. ribulose bisphosphate (RuBP) c. phosphoglyceraldehyde (PGAL) d. glucose e. oxaloacetate