Nervous system

The Interaction function

Objectives

How the interaction function developesWhat a neuron isHow the passage of impulses between neurones takes placeHow voluntary and reflex actions are different

The interaction function

The nervous system allows us to respond to the stimuli. The principles of a response to a stimulus can be summarised in this key sequence.

Which one of the following is the correct way for impulses to be carried by motor neurons?a.From the receptors to the effectorsb.From the co-ordinator to the receptorsc.From the co-ordinator to the effectorsd.From the effectors to the co-ordinator

Structure of neurons

lThe body of the cell is the thickest part of the neuron. It contains the nucleus and the majority of the organelles.lThe axon is a large prolongation which comes out of the body of the cell and it branches out at the end (normally protected and isolated by Schwann cells).lThe dendrites are small branching prolongations of the body of the cell.

Structure of the neuron