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प्रश्न
During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys
विकल्प
loss of milk teeth
increase in height
cracking of voice
weight gain
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उत्तर
cracking of voice
Explanation -
During adolescence, boys begin to have new thick hair growth on the face and their voices begin to crack. The skin becomes oily and pimples start appearing. Further, the penis occasionally begins to become enlarged and erect, either in daydreams or at night.
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संबंधित प्रश्न
Describe the human male reproductive system.
What are the major functions of male accessory ducts and glands?
Identify True/False statement. Correct false statement to make it true.
Spermatozoa get nutrition from Sertoli cells.
What happens in a boy’s body under the influence of hormones?
Write in sequence, the regions which a mature sperm travels from the seminiferous tubules up to the urethral opening in the human male.
What differences are there in number, structure, and activity of the male and female gametes in a man?
Write the functional activity of the following structure:
Seminiferous tubules
Multiple Choice Question:
If the vas deference of a man are surgically disconnected or removed.
The increased level of estrogen and progesterone is responsible for menstruation.
How much semen is generally present in seminal fluid?
Semen is secreted by ______.
Each testis is connected to the wall of scrotum by short. fibromuscular band called ______.
The ______ lead to vas deferens that ascends to the ______ and loops over the ______.
Urethral meatus refers to the ______.
Increased secretion of which hormone start the process of sperm formation at the time of puberty?
Mature sperms in humans are stored in ______.
Cell at the end of first meiotic division male sperm differentiates into ______.
______ is the smallest cell in males.
The figure given ahead is an organ system of humans. Study the same and answer the following questions.
 |
- Identify the organ system.
- Label the guidelines 1 to 7.
- Write one important role of parts 3 and 6.
- Name the cells of part 1 that produce testosterone.
- What is the significance of the part 1 being located in a separate sac suspended outside the body?
The penis is composed of which type of tissue that enables erection during insemination?
