Ouabain Is a Chemical Used on Poison Arrows in Africa

question 18

Multiple Choice

Ouabain is a chemical used on poison arrows in Africa.It works by inhibiting the Na+/K+ pump.What effect would this have on an action potential?

• A)It would prevent the stimulation of an action potential by removing Na+ from the cell.
• B)It would immediately cause an action potential to be generated.
• C)There would be no direct effect because the pump is used to maintain ion distributions, not to cause an action potential.
• D)It would cause the release of a neurotransmitter that would cause an action potential.

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Definitions:

Intestinal Drainage

A medical procedure or treatment designed to remove or flush out waste materials or toxins from the intestines.

Veins

Blood vessels that carry blood towards the heart.

SA Node

Sinoatrial Node, the natural pacemaker of the heart located in the right atrium, responsible for initiating the heart's electrical impulses.

Pacemaker

An electronic device implanted in the body to regulate the heartbeat, used primarily in conditions where the heart's rhythm is abnormally slow.