Explain the role sodium ions play in the depolarization stage of the action potential
What will be an ideal response?
Positively charged sodium ions make the membrane potential become less negative during depolarization. Sodium ions rush into a muscle cell with their concentration gradient when voltage-gated sodium ion channels open. The membrane potential reaches a peak of +30 mV.
You might also like to view...
The conversion of fibrinogen into fibrin is catalyzed by ____
a. albumin b. hemoglobin c. prothrombin d. thrombin
Cellular actions of insulin could be inhibited by ________.
A. decreasing intracellular calmodulin B. inhibiting translation C. stimulating protein kinase activity D. inhibiting receptor phosphorylation
How can action potentials code for the intensity of a stimulus?
A. More sodium ions enter the axon after a larger stimulus. B. A larger voltage change occurs during an action potential from a larger stimulus. C. The speed of the action potential increases after a larger stimulus. D. Action potential frequency increases after a larger stimulus.
Which of the following is NOT a cell type found in taste buds?
A. Basal cells B. Taste cells C. Mitral cells D. Supporting cells