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Dr. Vijay
Dr. Vijay about 4 years ago

I studied cardiology in physiology so i want u to ask some questions so that i can get to know how much i did

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about 4 years ago

Why our normal heart beat ranges between 60_100 although the discharge of SA node is 105beats/min??

about 4 years ago

Because the vagus acts as parasympathetic nerve and reduces the heart rate by opening k+ channels and closing Na+ channels.

about 4 years ago

Because SA node is to initiate action potential fast as compare to others even av node or Purkinje fibers can initiate at slow rate because of small gap junction btw them

about 4 years ago

I think major effects on parasympathetic(vagal) action it depressed SA node that is why SA node rate will decrease so heart rate decrease

about 4 years ago

What are the physiological changes in exercise (changes in cardiovascular system)

about 4 years ago

Heart rate increase CO increase