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

Name the function of the following: Sperm tail

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प्रश्न

Name the function of the following:

Sperm tail

लघु उत्तर
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उत्तर

The tail is an extremely vibrating posterior section of the sperm that aids in swimming. The capacity to swim (known as motility) is required for male fertility because the sperm has to move up the vaginal canal, cervix, and cervical canal to reach the ovum.

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पाठ 2: Human Reproduction - EXERCISES [पृष्ठ ४०]

APPEARS IN

एनसीईआरटी Biology [English] Class 12
पाठ 2 Human Reproduction
EXERCISES | Q 15. (d) | पृष्ठ ४०
नूतन Biology [English] Class 12 ISC
पाठ 2 Human Reproduction
NCERT EXERCISES | Q 15. (d) | पृष्ठ ११६

संबंधित प्रश्‍न

How many eggs do you think were released by the ovary of a female dog which gave birth to 6 puppies?


Rewrite the terms in the correct order so as to be in a logical sequence.

Sperm duct, penis, testes, sperms, semen.


Differentiate between the following pair: 

Uterus and vegina 


Modern techniques like surrogate mother, sperm bank and IVF technique will help the human beings. Justify this statement. 


After puberty human female shows cyclic changes in her reproductive system. Explain structural and hormonal changes in the uterus.

                                      (OR)

Give reasons :
(1) Scrotal sac serves as thermoregulator.
(2) Corpus luteum gets converted into corpus albicans in absence of fertilization.
(3) Missing of menses is the first indication of pregnancy.
(4) Surgical sterilization is a permanent method of birth control. (5) Human egg is microlecithal.


Give appropriate term of the following:
The monthly discharge of blood and disintegrated uterine tissues in human female.


Name the following:
The separation of the foetus from the mother's body.


Complete the following statement by choosing the correct alternative:
Female copulatory organ ______.


Give Reasons

Most often only one embryo is formed at a time although there are two ovaries in women. Explain.


Given below is a diagram of the female reproductive system of a human being

(i) Name the parts numbered 1 to 6.
(ii) Normally after how many days does an ovary release an egg?
(iii) Where are the sperms released during coitus?
(iv) What do the sperms do after being released?
(v) What is the function of the organ numbered 5?
(vi) How many days does it normally take from the fertilization of the egg up to the birth of the baby?


Explain the term Graffian follicle.


Name the Following

The term used when beard and mustache appear, harshening of voice, broadening of shoulders, etc. takes place.


Name the Following

The hormone that stimulates the contraction of the uterus during childbirth.


Give Technical Term:

What term is used for the production and maturation of eggs in the ovaries?


______ is homologous to Bartholin's glands.


Which of the following is a permanent method of contraception in a human female?


The second maturation division of the mammalian ovum occurs ______.


After birth, colostrum is released from mammary glands which is rich in ______.


Bartholin’s glands are situated ______.


Mark the odd one.


Where does fertilization take place? 


Read the following and answer from given below:

Oogenesis is the process of the formation of an ovum in the ovaries. It consists of three phases: multiplication, growth, and maturation. Oogenesis is controlled by hormones GnRH, LH, FSH. GnRH secreted by the hypothalamus stimulates the anterior lobe of the pituitary gland to secrete LH and FSH.

Which hormone induces the rupture of the mature Graafian follicle?


What is placenta? Mention its role during pregnancy?


Female reproductive organs and associated functions are given below in column A and B. Fill the blank boxes.

Column A Column B
Ovaries Ovulation
Oviduct a
b Pregnancy
Vagina Birth

Bartholin's glands are homologous to ______.


The part of Fallopian tube closest to the ovary is ______.


Complete the analogy with respect to reproductive system.

Male : Penis : : Female : ______.


Which glands provide lubrication in the external genitalia?


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