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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Identify True/False statement. Correct false statement to make it true. Androgens are produced by Sertoli cells.

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प्रश्न

Identify True/False statement. Correct false statement to make it true.

Androgens are produced by Sertoli cells.

सत्य या असत्य
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उत्तर

This statement is false.

Correct statement: 

Androgens are produced by interstitial cells or Leydig cells.

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अध्याय 2: Human Reproduction - EXERCISES [पृष्ठ ४०]

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एनसीईआरटी Biology [English] Class 12
अध्याय 2 Human Reproduction
EXERCISES | Q 16. (a) | पृष्ठ ४०
नूतन Biology [English] Class 12 ISC
अध्याय 2 Human Reproduction
NCERT EXERCISES | Q 16. (a) | पृष्ठ ११७

संबंधित प्रश्न

Humans are ______.


What are the major functions of male accessory ducts and glands?


Differentiate between the Tubectomy and Vasectomy (Part cut and tied)


Write a note on human sperm


State the reason why testes lie outside the abdomen in a scrotum?


Why is it important that a very large number of sperms should be present in the semen ?


With the help of labelled diagramms describe the structures of human sperm and unfertilized ovum. 
A couple is unable to conceive. Which modern techniques are available to overcome this problem? 


 The diagram shown below is the lateral section of the testis of man. Study it carefully and answer the questions that follow:

(i) Label the part I to 4 of the diagram.
(ii) State the functions of the parts labeled 1 and 2.


Write the functional activity of the following structure:

Cowper’s gland


In humans, there are ____________ pairs of chromosomes.


In humans, sperm production occurs in the organ ______.


State names of organs in male reproductive system.


Write the answers to the questions by observing the figure.

  1. What does the above figure show?
  2. Write the names of parts A, B, C, D.
  3. Write the function of the part 'D'.
  4. How is semen formed?

What is the enzyme present in the acrosome of sperm?


Identify the component(s) of seminal fluid.


Ejaculation of human male contains about 200 - 300 million sperms, of which for normal fertility ______% sperms must have normal shape and size and at least ______% must show energetic motility.


Spot the odd one out from the following structures with reference to the male reproductive system.


Seminal plasma, the fluid part of semen, is contributed by.

  1. Seminal vesicle
  2. Prostate
  3. Urethra
  4. Bulbourethral gland

In human males, the testes lie in the scrotum, because it helps in the ______ 


Identify A, B, C, D, in the given diagram of the human reproductive system:


Explain the function of the following structure in the human male reproductive system.

Scrotum


Explain the function of the following structure in the human male reproductive system.

Male accessory glands


Which of the following provides a proof for forensic test in case of rape?


Given below is a certain situation. Analyze and describe its possible impact on a person:

Prostate and seminal vesicles are not functional.


Mention the location and the function of Leydig cells.


Answer the following question based on the human male reproductive system:

What is the work of vas deferens?


State very briefly the chief function of the following:

Cowper's gland


The thin-walled sac of skin in which testis descends is ______.


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