EM 10th Science - Unit

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EM 10th Science - Unit - 15

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Choose the correct answer

1. Bipolar neurons are found in

1 point

retina of eye

cerebral cortex

embryo

respiratory epithelium

Clear selection

2. Site for processing of vision, hearing, memory, speech, intelligence and thought is

1 point

kidney

ear

brain

lungs

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3. In reflex action, the reflex arc is formed by

1 point

brain, spinal cord, muscle

receptor, muscle, spinal cord

muscle, receptor, brain

receptor, spinal cord, muscle

Clear selection

4. Dendrites transmit impulse_______ cell body and axon transmit impulse _______cell body.

1 point

away from, away from

towards, away from

towards, towards

away from, towards

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5. The outer most of the three cranial meninges is

1 point

arachnoid membrane

piamater

duramater

myelin sheath

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6. There are ________ pairs of cranial nerves and ________pairs of spinal nerves.

1 point

12, 31

31, 12

12, 13

12, 21

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7. The neurons which carries impulse from the central nervous system to the muscle fibre

1 point

afferent neurons

association neuron

efferent neuron

unipolar neuron

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8. Which nervous band connects the two cerebral hemispheres of brain?

1 point

thalamus

hypothalamus

corpus callosum

pons

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9. Node of Ranvier is found in

1 point

muscles

axons

dendrites

cyton

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10. Vomiting centre is located in

1 point

medulla oblongata

stomach

cerebrum

hypothalamus

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11. Nerve cells do not possess

1 point

neurilemma

sarcolemma

axon

dendrites

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12. A person who met with an accident lost control of body temperature, water balance, and hunger. Which of the following part of brain is supposed to be damaged?

1 point

Medulla oblongata

cerebrum

pons

hypothalamus

Clear selection

Fill in the blanks.

1. __________ is the longest cell in our body.

1 point

2. Impulses travels rapidly in _____________ neurons.

1 point

3. A change in the environment that causes an animal to react is called __________.

1 point

4. ___________carries the impulse towards the cell body.

1 point

6. A neuron contains all cell organelles except ___________.

1 point

7. _____________ maintains the constant pressure inside the cranium.

1 point

9. The part of human brain, which acts as relay centre, is ________.

1 point

True or False

1. Dendrons are the longest fibres that conducts impulses away from the cell body.

1 point

True

False

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2. Sympathetic nervous system is a part of central nervous system.

1 point

True

False

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3. Hypothalamus is the thermoregulatory centre of human body.

1 point

True

False

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4. Cerebrum controls the voluntary actions of our body.

1 point

True

False

Clear selection

5. In the central nervous system myelinated fibres form the white matter.

1 point

True

False

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6. All the nerves in the body are covered and protected by meninges.

1 point

True

False

Clear selection

7. Cerebrospinal fluid provides nutrition to brain.

1 point

True

False

Clear selection

8. Reflex arc allows the rapid response of the body to a stimulus.

1 point

True

False

Clear selection

9. Pons helps in regulating respiration.

1 point

True

False

Clear selection

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