Which stage of an action potential would be the target (or most affected) by adding tetrodotoxin? Your answer should include how this toxin works (what does it affect). For the toolbar. press ALT + F 10 (PC) or A L T + FN + F 10 (Mac). QUESTION 13 4 points Match the type of epithelial cell to its description and/or location simple squamous epithelim A. mucus secreting cells that have cilia and are found in the .