Which of the following will cause a decrease in Extracellular K+?
A. Lactic Acids
B. Epinephrine
C. Glucagon
D. Atropine
Answer. D
Solution. Lactic acid is known to increase extracellular potassium (K+) concentration.
Epinephrine, also known as adrenaline, can cause an increase or decrease in extracellular K+
depending on the dose and the specific physiological conditions. In general, epinephrine has a
tendency to increase extracellular K+. Glucagon has a tendency to increase extracellular K+.
Atropine, which is a muscarinic acetylcholine receptor antagonist, can cause a decrease in
extracellular K+. It’s important to note that the exact effect of these substances on extracellular
K+ can be influenced by various factors such as dose, duration, and overall physiological state
of the organism.