17.1k views
0 votes
The long plateau in the action potential observed in cardiomyocytes is probably related with _________ₛtaying longer in the cytosol.

a) Na⁺
b) K⁺
c) Ca²+
d) Cl⁻
e) Na⁺, K⁺, and Ca²+

1 Answer

3 votes

Final answer:

The long plateau phase in cardiomyocytes' action potential is due to the prolonged presence of calcium ions (Ca²+) in the cytosol, which ensures effective heart contractions.

Step-by-step explanation:

The long plateau in the action potential observed in cardiomyocytes is related to calcium ions (Ca²+) staying longer in the cytosol. The influx of Ca²+ through voltage-gated calcium channels during the action potential causes a prolonged depolarization phase, or plateau, which is essential for enabling the cardiac muscle to contract effectively. The Ca²+ influx also contributes to the long refractory period, preventing premature contractions and ensuring the heart pumps effectively.

User Kaan Dedeoglu
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.