Which of the following events is NOT a characteristic of an action potential?
A. The plasma membrane becomes highly permeable to sodium ions and depolarization results.
B. As sodium ions enter, the inside of the plasma membrane becomes more negative.
C. At the peak of depolarization, sodium channels begin to close and potassium channels open.
D. In repolarization, potassium ions flow out of the cell.
E. Action potentials occur according to the all-or-none principle.
B
You might also like to view...
During the postabsorptive state, ________ stimulate(s) lipid catabolism
A) glucocorticoids B) androgens C) insulin D) glucagon E) gastrin
"Endocrine" means
A) internal secretion. B) hormone synthesis. C) acts upon target cells. D) fast-acting compound.
Following ET intubation, the ideal time to attach the capnography T-piece is:
A) when the bag is attached to the ET tube. B) after 6 to 8 positive pressure breaths. C) immediately after removing the stylet. D) after auscultating the lungs and epigastrium.
The fact that the structures of cells vary widely reflects the specializations needed for their different functions.
Answer the following statement true (T) or false (F)