When the potential across a membrane reaches threshold, the sodium channels ____.
a. open to let sodium enter the cell rapidly
b. close to prevent sodium from entering the cell
c. open to let sodium exit the cell rapidly
d. close to prevent sodium from exiting the cell
Question 2
Your posterior pituitary is most likely to release antidiuretic hormone (ADH) ____.
a. if you are very thirsty
b. shortly after drinking a large glass of water
c. if you are very hungry
d. shortly after eating a large meal
The phases and ionic basis of an action potential.
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