False about funny current channel in hea

A. 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

Correct Answer: It is a Na-K ATPase pump

Description: 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.

Category: Physiology

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