If you submerge a mussel in an environment in which the ambient osmotic pressure progressively increases, the blood osmotic pressure of the mussel will
a. also progressively increase.
b. also progressively decrease.
c. increase first and then decrease.
d. decrease first and then increase.
e. not change.

The correct option is 'a'

If osmotic pressure increases when a mussel is submerged in the water,the blood osmotic  pressure also increases.

Explanation:

Mussels are bivalves that are found in fresh water as well as marine water.

They have bluish blood and small heart pumps the blood.Some mussels have red blood which contain hemoglobin that carry oxygen rather than hemocyanin.

The mussels show increase in blood chloride level and amino acid when the osmotic pressure of the water increases.

Submerging the mussel in the aquatic environment increases osmotic pressure of the mussel.

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answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

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