State the effect of norepinephrine on skeletal muscle contraction and heart muscle contraction.

Norephinephrine increases the ‘force of contraction’ of the skeletal muscle and the heart muscles.

Explanation:

This force of contraction is an important factor in the body’s fight –or-flight response by making it to retreat when exposed to a threat.  

Norephinehrine or noradrenaline is a catecholamine and the catechol group and the methyl group combines to form epinephrine which helps the body to act in a fight or flight response.  

It is for the same reason that norepinephrine is used during critical hypotensive conditions during heart attack, septic shock, neurogenic shock, etc.

c. flammable gases, patient lying in standing water, combustible liquids near the victim