When a person stands suddenly from lying down posture, there is
(A) Increased tone of capacitance vessels. > It occurs due to noradrenergic impulses causing venoconstriction via their action on a1 and a2 - adrenergic receptors on systo veins.
Increased tone of capacitance vessels.
Increase efferent discharge from IX cranial nerve
Decreased heart rate
All of the above
Nervous System