Tetrodotoxin binds to sodium channels and blocks the passage of sodium ion based on this information which symptom would most likely occur in an organism exposed to tetrodotoxin? A. Decreased appetite due to the production of hormones that indicate fullness. B. Increased heart rate due to increased nerve impulses to the heart muscles. C. Blindness due to proteins in the eyes denaturing and losing functionality. D. Paralysis due to the lack of action potentials to signal muscle tissue.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.