State two disadvantages of molting in Arthropods

One major disadvantage is the need to molt. Arthropods are highly vulnerable during this time, since the new exoskeleton starts out very soft and needs some time to harden. Until it hardens completely, the animal has almost no protection.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .