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In our body, the largest number of neuron cells can be found in ___.

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Important Questions on Neural Control and Coordination

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Observe the following diagram of brain of man and identify the parts labelled as I and III.

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Match the following ?

  Column I   Column II
(i) Satellite cells (a) form myelin sheath
(ii) Microglial cells (b) providing blood-brain barrier
(iii) Ependymal cells (c) surrounds the cell bodies in ganglia
(iv) Oligodendrocytes (d) movements in cerebrospinal fluid
(v) Astrocytes (e) Phagocytic cells
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Identify the components of neuromotor system in sequence?
(i) Kineto desmata
(ii) Kinety
(iii) Kinetosome
(iv) Infraciliary system
(v) Kineto desmal fibrils
(vi) Motorium
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Assertion (A): Mammals have a relatively large brain when compared to that of other animals in relation to body size.
Reason (R): The number of optic lobes is four in mammals and two in other vertebrates.
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Identify A, B, C and D in the following graph regarding nerve impulse transmission.

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Assertion (A): In myelinated nerve fibres, action potentials are conducted at a faster rate.

Reason (R): The myelin present between nodes of Ranvier has concentrated Na and K voltage-gated channels.