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Question
Assertion :Nerve cells arise from the neural plate of embryonic endoderm and serve as the structural and functional units. Reason: Nerve cells are highly excitable cells specialized for impulse conduction known as neurons.
Assertion :Nerve cells arise from the neural plate of embryonic endoderm and serve as the structural and functional units. Reason: Nerve cells are highly excitable cells specialized for impulse conduction known as neurons.
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Solution
The correct option is D Assertion is incorrect but reason is correct.
During the stage of neural plate formation the embryo consists of three cell layers, the ectoderm, that eventually form the skin and neural tissues, the mesoderm, that forms muscle and bone, and the endoderm, that will form the cells lining the digestive and respiratory tracts. Hence, ectoderm instead of endoderm is responsible for the formation of nerve cells. The part of the endoderm The highly excitable cells specialised for impulse conduction are called nerve cells or neurons. So, the correct answer is option D.
During the stage of neural plate formation the embryo consists of three cell layers, the ectoderm, that eventually form the skin and neural tissues, the mesoderm, that forms muscle and bone, and the endoderm, that will form the cells lining the digestive and respiratory tracts. Hence, ectoderm instead of endoderm is responsible for the formation of nerve cells. The part of the endoderm
The highly excitable cells specialised for impulse conduction are called nerve cells or neurons. So, the correct answer is option D.
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