The nervous system of hydra is classified as a diffused nervous system because it has
Correct answer: C. A network of neurons between ectoderm and endoderm
- A. Several pressure receptors
- B. Numerous differentiated neurons
- C. A network of neurons between ectoderm and endoderm
- D. Several nodes of Ranvier along the length of sensory axons
Explanation
The correct answer is that the hydra's nervous system is characterized by a network of neurons located between the ectoderm and endoderm, typical of a diffused nervous system. This simple structure allows for basic responses to stimuli without the complexity of differentiated neurons or structures like nodes of Ranvier, which are associated with more advanced nervous systems in vertebrates.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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