Question

6. Draw a labelled diagram of a myelinated neuron.
7. What is the difference between reflex action and
ofantasy action
system?
2
(a) Name the parts labeled 1, 2, 3 and 4.
6) Name the protective membranous covering of the brain. Also mention its three layers.
(c) Name the basic unit of the brain.
(d) Write the important role of the part mentioned as 2.
Given below are a few situations. What effective change will occur in the organ/body part mentioned and which
part (sympathetic or parasympathetic) of the autonomic nervous system brings it about?
Organ
Body Change/Action
part
system involved
Part of autonomic nervous
Situation
Eve
Neurotronsmitters are broken down by an enzyme just
after passing an impulse from one neuron to the other.
E STRUCTURED/APPLICATION/SKILL TYPE
Two hungry boys (A and B) enter a restaurant and see the menu. Boy B starts salivating but not A. Explain the
reason for this difference.
The diagram alongside shows a section of the human brain and its
What are the advantages of having a nervous
associated parts. Answer the questions that follow :​

Answer 1

Neurons (also called neurones or nerve cells) are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.

Answer 2

Answer:

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