Which of the following is regarded as a unit of nervous tissue?
Correct answer: A. Neurons
- A. Neurons
- B. Myelin sheath
- C. Axons
- D. Dendrites
Explanation
Neurons are the structural and functional units of the nervous system. Each neuron consists of a cell body, a xon, sendritas, specialized for receiving and transmitting nerve impulses. The myelin sheath only insulates some axons but is not itself a unit of nervous tissue.
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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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