Which of the following is considered the structural and functional unit of neural tissue?

Four healthy people in their twenties were involved in injuries resulting in damage and death of a few cells of the following types. Which of these cells are least likely to be replaced by new cells?

Where are Nissl's granules present?

Which one of the following is essential for the formation of the myelin sheath?

The cerebral cortex has which type of neurons?

What is the structural and functional unit of the neural system?