If the membrane potential at the axon hillock becomes subthreshold, an action potential will be fired.

true/false

False

Explanation:

Action potential will only be fired when the memebrane potential is above the threshold level.

This follows the all-none -principle.

No matter the strenght of stimulus if the magnitride is not upto the threshold level,No action potential will.be generated.

An example is the flushing of water closet or lavoratory.No mater one tried to flush,if the water in the closet does not fill up to the threshold for flushing,,to propel flushing. not flushing will take place.

which

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.