Both involve gaining a positive effect from a source which becomes harmed.
Example: a predator eats it's prey for food
A parasite like a tape worm feeds off the nutrients in your body and makes the person sick
Answer:
Neurotransmitter
Explanation:
A neurotransmitter is a signal which transmits information between neurons at the end of the axon. This neurotransmitter can either be excitatory or inhibitory. Whenever an action potential is triggered within a neuron, the neurotransmitter releases this action potential into the synapses at the axon as either an excitatory or inhibitory signal before a new action potential is triggered.
Membranes control whats good or whats bad to get inside the cell, basically it allows good things to pass into the cell and bad things to stay out
Be yourself
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The correct answer is that the shells of clams and other mollusks dissolve when the pH becomes more acidic.
This is because the shells of clams and other mollusks are made of calcium carbonate that is dissolved in acidic conditions. The pH needs to be low to dissolve calcium carbonate into it. It takes few days to dissolve the shell completely.
