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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]

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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

Put a tick mark (✓) against the correct alternative in the following statement:

Internally, the uterus opens into:


State the function of Fallopian tubes.


Mention the exact location of the following : 
Corpus callosum 


Why is zona pellucid retained around the egg till it reaches the uterus?


The below diagram represents the vertical view of the human female reproductive system.

(i) Label the parts indicated by the guidelines 1 to 8.
(ii) How does the uterus prepare for the reception of a zygote?
(iii) What happens to the uterus if fertilization takes place?
(iv) What happens to the uterus if fertilization has failed to take place?


Explain the term Graffian follicle.


Give Technical Term:

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


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

The cilia lining the oviduct funnel, push the released ovum into the uterus.


The largest cell in the human body of a female is ______.


A neat labelled diagram describes the parts of a typical angiospermic ovule.


Identify the term used for isthmus.


______ pollen mother cells should undergo meiotic division to produce 64 pollen grains.


All are associated with ovulation in human female, EXCEPT


Identify the layer of the uterine wall that undergoes changes during menstrual cycle.


The follicular fluid present in the antrum is secreted by ______


Ovulation occurs under the influence of ______.


Which of the following is correct about mammalian testes?


To answer the question, study the graphs below for Subjects 1 and 2 showing different levels of certain hormones.

 

Which of the following statements is true about the subjects? 


The fertilization of the human egg by the sperm takes place in ______  


Fertilization occurs in human females when the sperms and ovum reach simultaneously at ______


What changes are observed in the uterus subsequent to the implantation of a young embryo?


State whether the following statement is True or False. If false, correct the statement:

In adult human females, a single mature egg is released into an oviduct every month.


In rabbits, humans and other placental mammals, fertilization occurs in ______.


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

The _____ is also called the womb.


The ______ is also called the womb.


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

Graafian follicle, ostium, uterus, fallopian tube, ovum.


What is the length of an ovary?


What connects the embryo to the mother for nutrient and waste exchange till birth?


Which structure is a thin membrane partially covering the vaginal opening and has variable presence?


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