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Rate of heart beat is reduced by

Acetylcholine
Adrenaline
Calcitonin
Thyroxine
Additional Questions

Coronary heart disease is due to

Answer

Ridges present in the ventricles are

Answer

Right atrium receives blood from

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SA node is located

Answer

Sympathetic nervous system

Answer

Systolic pressure in adult human is

Answer

People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude

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Systolic pressure is 120 mm Hg and diastolic pressure is 80 mm Hg, the pulse pressure is

Answer

The difference between systolic and diastolic pressure in human is

Answer

The heart muscles are

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