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At the peak of the action potential, the membrane potential is ________.

Endogenous opiates block the perception of pain. How do they do this?

True or false: The axon hillock is the region of the neuron where action potentials are generally initiated. (0.5 pts.)

The peptide hormone described earlier would have a leader sequence to direct it to ________.

Where can cytosine be found?

Which type of cell in the central nervous system is important in establishing the blood-brain barrier?

Which of the following nucleotide sequences accurately represents the mRNA that would be produced from the following template strand sequence? ACAGAGTGACAGAAC

Seizures, depending on the type, can result in a profound elevation of lactate. This effect is believed to be a result of muscle hypoxia (decreased oxygen) during the seizure. Elevated lactate levels in this setting are transient. Under low oxygen conditions, which enzyme is responsible for the elevated levels of lactate?

Where can deoxyribose be found?

Extra credit: How many nieces and nephews does Dr. Hansen have?