Which one of the following options contains structures that distinguish a nerve cell from other types of cell?
Which one of the following options contains structures that distinguish a nerve cell from other types of cell?
The correct option is B Perikaryon and dendrites
Neurons are the structural and functional unit of the nervous system.
1. Cell body or perikaryon: that contains cytoplasm with typical cell organelles and certain granular bodies called nissl’s granules.
2. Dendrites: these are short fibres that originate from the cell body and are highly branched. They transmit the nerve impulses towards the cell body.
Perikaryon and dendrites are exclusively present in nerve cells and not other types of cells. And hence it is the correct answer.
Nucleus, mitochondria, vacuoles and cytoskeletal fibres are present in almost all types of cells, hence they are incorrect.
While medullary sheath is unique to nerve cells, the flagellum is absent in nerve cells. And hence it is the wrong answer.
Perikaryon and dendrites
Neurons are the structural and functional unit of the nervous system.
1. Cell body or perikaryon: that contains cytoplasm with typical cell organelles and certain granular bodies called nissl’s granules.
2. Dendrites: these are short fibres that originate from the cell body and are highly branched. They transmit the nerve impulses towards the cell body.
Perikaryon and dendrites are exclusively present in nerve cells and not other types of cells. And hence it is the correct answer.
Nucleus, mitochondria, vacuoles and cytoskeletal fibres are present in almost all types of cells, hence they are incorrect.
While medullary sheath is unique to nerve cells, the flagellum is absent in nerve cells. And hence it is the wrong answer.
