Answer:
b. di uses across a synaptic cleft from a neuron to a muscle cell.
Explanation:
A neurotransmitter is di uses across a synaptic cleft from a neuron to a muscle cell. Neurotransmitters are chemicals which enable neurotransmission. In reaction to an impulse a motor neuron axon secretes a neurotransmitter and causes the muscle fiber to contract. It is a chemical messenger which passes on the signals across the chemical synapse.
2.5g/ml will sink because it has higher density compared to water
0.5g/ml will float because it has lower density compared to water
2 because the 1st energy level can only hold 2 electrons and the 2nd holds 4
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The Election Transport Chain
