<span>Most reflex arcs involve only three neurons. The stimulus, such as a needle stick, stimulates the pain receptors of the skin, which initiate an impulse in a sensory neuron. This travels to the spinal cord where it passes, by means of a synapse, to a connecting neuron called the relay neuron situated in the spinal cord.</span>
It would most likely be A. 10grams considering grams is the smallest and we are talking about a feather.
Lysosomes break down food and worn out cell parts
