Norepinephrine
$(i)$ is released by sympathetic fibers
$(ii)$ is released by parasympathetic fibers
$(iii)$ increases the heart rate
$(iv)$ decreases blood pressure.
Which of the above statements are correct ?
$(i)$ and $(iii)$
$(ii)$ and $(iii)$
$(ii)$ and $(iv)$
$(i)$ and $(iv)$
Select the correct option on the basis of following sentences : This gland's :
$(I)$ Hormones increase alterthess
$(II)$ Hormones increase the heart beat
$(III)$ Stimulate the breakdown of glycogen
$(IV)$ Stimulate the breakdown of lipids and proteins
When a normal heart is injected with physiological concentration of adrenalin, it shows
The main function of nor-adrenaline is
Secretion of aldosterone in birds, man and other mammals is stimulated by
Life saving hormone is secreted by which gland