A _ is a junction between two neurons or between a motor neuron and a muscle cell.
Correct answer: B. Synapse
- A. Impulse
- B. Synapse
- C. Axon
- D. Cleft
Explanation
In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target effector cell. It can be visualized as a gap between two neurons; however, that gap isn't referred to as a synapse, but rather the gap, also known as the synaptic cleft, alongside the end of the pre-synaptic neuron and the start of the post-synaptic neuron is collectively known as the synapse. Option B is hence correct.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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