When blood glucose levels drop and glucose stored in the form of liver glycogen is needed to restore normal blood glucose levels, what enzyme is needed to release glucose locked inside the liver? (assume the liver glycogen has been broken down into units of glucose)

i believe the enzyme that needs to be released is called Glucokinase.

Explanation:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.