Question
Which of the following is a characteristic of the onset of puberty in boys?
The correct answer is
Growth of a moustache
Puberty Signs in Boys
Puberty is a stage of rapid growth and development where a person becomes sexually mature. In boys, several distinct physical changes occur.
Identifying Male Puberty Characteristics
Let's examine the options provided:
- Growth of hairs on head: Hair growth on the head is a continuous process throughout life and not a specific indicator of puberty onset.
- Growth of a moustache: The development of facial hair, including a moustache and beard, is a secondary sexual characteristic directly associated with the onset of puberty in boys due to hormonal changes (increased testosterone).
- Growth of pineal gland: The pineal gland's primary function relates to sleep cycles (melatonin production) and it doesn't significantly enlarge or change as a primary sign of puberty onset.
- Growth of liver: While the liver grows throughout childhood and adolescence, its growth is not a specific marker for the onset of puberty.
Therefore, the growth of a moustache is a clear characteristic indicating the beginning of puberty in boys.
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Important Questions from Human Body
- Which part of a neuron carries the nerve impulse away from the cell body?
- What is the main function of bile in human digestion?
- A woman using a copper-T complains of abdominal pain and discomfort. What is the likely reason?
- Which of the following events directly triggers the process of menstruation?
- Read the given assertion (A) and reason (R) and select the most appropriate option.
(A): The onset of puberty in females occurs earlier than in males, but both attain their final height by 18-20 years of age.
(R): Although puberty begins later in males, their growth spurt is more rapid than in females.
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