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Thursday, 24 April 2014

Clarifying the 3 Notes in the Nervous System

We have charted the deepest oceans & mapped the observable universe. Yet, we have no idea when it comes to our brain. Interesting questions can be asked such as...

What is consciousness? 
What is mind over matter? 
Is clairvoyance possible? 
How much can we remember?
Are the brains actually the location of our souls..?
That' why the nervous system topic in Coordination & Response is one the most exciting topic in Biology F5. Before we venture forth to the mystery of the mind, let's clarify ourselves by enjoying the 3 notes below...

1) Differentiating neurone & nerve tissue

The neuron is a cell, while the nerve tissue is a bunch of similar cells. Their functions are to transmit impulse.

2) Nervous System Classification

Central nervous system (CNS) organs are located in the middle of our body, while the peripheral nervous system (PNS) components are located at the 'side' of the CNS.

The nervous system stripped from a human body. Can you identify the CNS & PNS?

3) Afferent & Efferent Neurones
Combining the notes above, we can see the arrangement of CNS/PNS & the neurones inside them. 

Afferent & efferent neurones form the PNS, with different function.

Afferent neurones are the PNS neurones transmitting impulse towards the CNS.
Efferent neurones are the PNS neurones transmitting impulse away from the CNS.

Next time, we shall explore the almighty connections that make the mind possible - the synapse. Until then...


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