• Between beats (phase 4) the sodium and calcium channels are closed and potassium channels are open.
• Action potentials cause contraction by liberating calcium from the SR into the cytosol.
• Autonomic nerves modulate the heart rate. Sympathetic stimulation increases the rate of SA node firing and the rate of conduction through the AV node. Parasympathetic stimulation decreases the rate of SA node firing and the rate of conduction through the AV node.
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One of the main home remedies that you need to follow to prevent gallstones is a healthy lifestyle. You need to maintain a healthy body weight to prevent gallstones. The following are the best home remedies that will help you to treat and prevent gallstones.