Physiology Which of the following is the function of Hyperpolarizing Cyclic Nucleotide (HCN) gated channels? A Cardiac rhythm generation B Generation of mitochondrial action potential C Myocardial muscle contraction D Memory formation 💡 Explanation Which of the following is the function of Hyperpolarizing Cyclic Nucleotide (HCN) gated channels? ✓ Correct Answer: A. Cardiac rhythm generation