Working of HEART

Muscles connected with working of insect heart are

How do parasympathetic neural signals affect the working of the heart?

Covering of heart is called

How do parasympathertic neural signals affect the working the heart

Assertion : There are 72-75 heart beats per minute on an average when a person is performing normal work Reason : One heart beat is completed in 0.8 second.

Assertion: SA node malfunctioning leads to disturbance of Heart rate Reason: SA node is the pacemaker of heart producing electrical impulse for heart contraction

In cockroach, the position of heart is

The work done by the heart is J J per beat .Calculate the power of the heart if it beats. 72 times in minute.

The average work done by a human heart while it beats once is 0.5 J. Calculate the power used by heart if it beats 74 times in a minute

The averge work done by a human heart while it beats once is 0.5J. Calculate the power used by heart if it beats 75 times in a minute.