This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conducting System of Hea, Subject name: Physiology
[{'content': 'False about funny current channel in hea \nSelect and explain. \nA. It is a Na-K ATPase pump, B. They are responsible for diastolic depolarization, C. It is responsible for spontaneous rhythm producing tissue of hea, D. They are voltage dependent channel only', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Funny / leaky Na+ channels: - Hyperpolarization activated cyclin nucleotide gated (HCN) channels. More the hyperpolarization more the activation Equally permeable for Na+ & K+ After repolarization occur by K+ exit in pacemaker cells, next depolarization spontaneously reaches threshold, major pa in this spontaneous depolarization is by Na+ funny channel.', 'role': 'assistant'}]