Which of the following represents an important outcome of looping?
a. establishment of left-right asymmetry
b. specification of the atria and ventricles
c. establishment of anterior-posterior asymmetry
d. development of the secondary heart field

a. establishment of left-right asymmetry

Explanation:

Cardiac looping is the process in which the heart transforms itself from a straight embryonic heart into a loop that is wounded helically. The looping of the heart takes place on the 23rd day of development.As a result of this looping, there is bending of the cranial portion of the heart to the towards the right end and the caudal portion of the heart towards the left end.At the end of this looping the atrium takes up a dorsal and cranial position and the ventricle is displaced towards left.Thus, the outcome of looping is the establishment of left-right asymmetry.

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

This is giving me a headache i have asked others and they don’t know it either