The primary feature of a neuron that prevents the action potential from traveling back from where it just passed is the ____.
a. concentration gradient
b. refractory period
c. sodium potassium pump
d. phospholipid bilayer
Question 2
The brain can anticipate an osmotic need before the rest of the body actually experiences it ____.
a. through the change in blood pressure
b. because the stomach can detect high levels of sodium
c. through detection of highly concentrated urine
d. because of the rate of vasopressin release
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