What is the sodium-potassium pump?
a. A cell membrane protein that uses energy to pump sodium into the cell
b. A cell membrane protein that uses energy to pump sodium out of the cell
c. A mechanism present throughout interstitial fluid for draining sodium from the circulation
d. A mechanism present in the kidneys that exchanges sodium with lactic acid in order to regulate organic acid concentration
Question 2
Which of the following herbal preparations is most likely to be associated with anxiety?
a. yohimbe b. feverfew
c. ginger d. ginkgo