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What Is a Neuron?

Percentage of...

Question

Percentage of nerve cells deteriorated till the age of 70 years is __________.

10%

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20%

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30%

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35%

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Solution

The correct option is B 10%
As the age of a person advances, the Brain and spinal cord lose nerve cells and undergoes atrophy. By the age of 70 years, approximately 10% of nerve cells undergo atrophic changes.
So, the correct answer is 'Option A-10%'.

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Similar questions

Class	15 $-$ 20	20 $-$ 25	25 $-$ 30	30 $-$ 35	35 $-$ 40	40 $-$ 45
Percentage	80	73	61	52	47	40

Age (in years)	$10 - 20$	$20 - 30$	$30 - 40$	$40 - 50$	$50 - 60$	$60 - 70$
No. of patients	$60$	$42$	$55$	$70$	$53$	$20$

300

360

Age in years	$10 - 20$	$20 - 30$	$30 - 50$	$50 - 60$	$60 - 70$
No. of patients	$80$	$50$	$80$	$120$	$30$

9

7

A

35

65

3

2

B

45

75

30

The following are the ages of 300 patients getting medical treatment in a hospital on a particular day:

Age (in years)	10−20	20−30	30−40	40−50	50−60	60−70
Number of patients	60	42	55	70	53	20

Form a 'less than type' cumulative frequency distribution. [CBSE 2013]

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