Read the following statements.
(a) A special neural centre called cardiovascular centre is present in medulla oblongata.
(b) Sympathetic nerve endings which release adrenaline accelerate the heart beat.
(c) Parasympathetic nerve endings which release acetylcholine decrease the speed of conduction of action potential in heart.
(d) Adrenal medullary hormones released during resting conditions cause a reduction in strength of heart contraction and cardiac output.
How many of the above statements are correct?
Two
One
Four
Three
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ONE STAREMENT IS CORRECT FROM ALL OF THE ABOVE
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