Answer: producer
Explanation:
producers such as plants and algae make their own food from the sun through photosynthesis
The all or nothing law of action potentials mainly talks about how the axons in the neurons only fire when there is enough action potential to fire. If there is not enough action potential, then the neuron will not be able to send signals because the action potential does not fire because of the deficit.
that wud be the cardiovascular system, because whatever the problem, this system works the hardest to maintain homeostasis.....