Worksheet Number 1 (Control & coordination)
Class X Biology ( Courtsey- NCERT Exempler)
Multiple Choice Questions
1. Electrical impulse travels
in a neuron from
(a) Dendrite → axon → axonal end → cell body
(b) Cell body → dendrite → axon → axonal end
(c) Dendrite → cell body → axon → axonal end
(d) Axonal end → axon → cell body → dendrite
2. In a synapse, chemical
signal is transmitted from
(a) Dendritic end of one neuron to axonal end
of another neuron
(b) Axon to cell body of the same neuron
(c) Cell body to axonal end of the same neuron
(d) Axonal end of one neuron to dendritic end
of another neuron
3. In a neuron, conversion of
electrical signal to a chemical signal occurs at/in
(a) Cell body
(b) Axonal end
(c) Dendritic end
(d) Axon
4. Which is the correct
sequence of the components of a reflex arc?
(a) Receptors→ Muscles→ Sensory neuron→ Motor
neuron→ Spinal cord
(b) Receptors→ Motor neuron → Spinal cord →
Sensory neuron → Muscle
(c) Receptors → Spinal cord → Sensory neuron →
Motor neuron → Muscle
(d) Receptors → Sensory neuron → Spinal cord →
Motor neuron → Muscle
5. Which of
the following statements are true?
(i) Sudden action in
response to something in the environment is called reflex action
(ii) Sensory neurons carry
signals from spinal cord to muscles
(iii) Motor neurons carry
signals from receptors to spinal cord
(iv) The path through which
signals are transmitted from a receptor to a muscle or a gland is called reflex
arc
(a) (i) and (ii) (b) (i)
and (iii)
(c) (i) and (iv) (d) (i) ,
(ii) and (iii)
6. Which of
the following statements about transmission of nerve impulse is incorrect?
(a) Nerve impulse travels
from dendritic end towards axonal end
(b) At the dendritic end
electrical impulses bring about the release of some chemicals which generate an
electrical impulse at the axonal end of another neuron
(c) The chemicals released
from the axonal end of one neuron cross the synapse and generate a similar
electrical impulse in a dendrite of another neuron
(d) A neuron transmits
electrical impulses not only to another neuron but also to muscle and gland
cells
7. Junction
between two neurons is called
(a) Cell junction
(b) Neuro muscular junction
(c) Neural joint
(d) Synapse
8. What is the
correct direction of flow of electrical impulses?
9. In humans, the life processes are
controlled and regulated by
(a) Reproductive and
endocrine systems
(b) Respiratory and nervous
systems
(c) Endocrine and digestive
systems
(d) Nervous and endocrine
systems
Short
Answer Questions
10. Column
(A) Column (B)
10. Label part a, b,c and d.
Long Answer
Questions
.
11. What are
reflex actions? Give two examples. Explain a reflex arc.
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12. “Nervous
and hormonal systems together perform the function of control and coordination
in human beings.” Justify the statement.
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