How does norepinephrine, the sympathetic neurotransmitter, increase the heart rate?
a. it shortens the duration of the pace-maker action potentials.
b. it increases coupling among cardiomyocytes.
c. it increases transmission in the bundle of his.
d. it makes the atrioventricular node the primary pace-maker of the heart.
e. it accelerates the recovery phase of the spontaneously pace-maker activity

2mcg of demopressin actate or half of the 4mcg/ml container.

Maybe meditation,stress relievers,try to have quite time try to get school done on time and try to go to bed earlier

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!