Q6 of 102 Page 118

Explain the following terms:

Gray matter .......................

Gray matter is a major component of the central nervous system. Grey matter is distinguished from white matter, in that it contains numerous cell bodies and relatively few myelinated axons, while white matter contains relatively few cell bodies and is composed chiefly of long-range myelinated axon tracts.


More from this chapter

All 102 →
6

Explain the following terms:

Conditioned reflex ..................

 6

Explain the following terms:

Association neuron ................

 7

Rearrange the following in correct sequence pertaining to what is given within brackets at the end.


(a) Effector- Sensory neuron - Receptor- Motor neuron - Stimulus - Central nervous system - Response (Reflex arc)


 


(b) Repolarization - Depolarization - Resting (polarized) (during conduction of nerve impulse through a nerve fiber)


 


(c) Axon endings- Nucleus-Dendrites-Axon - Perikaryon- Dendron (Neuron structure)


 


(d) Diencephalon -Cerebellum - Medulla oblongata - Pons - Cerebrum - midbrain (sequence of parts of the human brain).

 1

What is meant by reflex action?