Tag: neural tissues

Nerve cells carry out different function as, to receive the message from within or outside of the body, to transfer the messages from body part to the brain, to carry the signal from the brain to different parts of the body. Thus nerve cell helps the brain in control and coordination of the body.
Therefore, option D is correct. 

a) Multipolar neurons have more than two processes emanating from the neuron cell body. They are mainly located in central nervous system and are most common type of human neurons.

• Unipolar nerve cell means Nerve cell without dendron. They have only one structure extending from the soma(cell body).
• Unipolar neurons are common in insects, where the cell body is often located at the periphery of the brain and is electrically inactive.
  
• Hence Unipolar nerve cell means Nerve cell without dendron.
• So, the correct answer is 'Nerve cell without dendron'.

A complex network of nerve cells or neurons forms the nervous system. This system is responsible for transmitting electrical impulses throughout the body.

The nature of nerve impulse is electrochemical(with in neuron it is electrical and between neuron it is chemical).

• The human body is made up of trillions of cells. Cells of the nervous system called nerve cells or neurons, are specialized to carry "messages" through an electrochemical process. Neurons carry out basic cellular processes such as protein synthesis and energy production.
• Protein synthesis in the extensions of nerve cells, called dendrites, Local protein synthesis in dendrites, not in the cell body of nerves, provides the ability to respond rapidly and selectively to external stimuli.