Advertisements
Advertisements
प्रश्न
Answer the following question.
What is capacitation? Give its importance.
Advertisements
उत्तर
Capacitation generally requires 5-6 hours during which the acrosome membrane becomes thin, Ca++ enters the sperm, and sperm tails begin to show rapid whiplash movements.
As a result of capacitation, sperms become extra active and begin to start moving upwards from the vagina to the uterus and to the oviducts. Prostaglandins activate the sperms. The vestibular secretions of the female also enhance sperm's motility. The sperms swim at an average speed of 1.5 to 3.0 mm/min and reach the ampulla. The contraction of uterus and fallopian tubes stimulated by oxytocin of females also aids in the movement of sperm. After capacitation the sperms may reach the ampulla within 5 minutes.
APPEARS IN
संबंधित प्रश्न
State whether the following statement is true (T) or false (F):
The plumule of an embryo gives rise to the root system.
Define the term Gamete.
Name the following:
The accessory gland in human males whose secretion activates the sperms
Differentiate between:
Semen and sperm
Given below is a portion of the diagram to show the diagrammatic highly magnified view of a single human sperm. Complete the diagram to show its normal structure.
The figure given alongside represents the female reproductive system of a mammal.
Name the parts labelled A - D
Name the following:
Virgin birth
The diagram given below is that of a developing human foetus in the womb. Study the same and answer the question that follow:
What term is given to the period of development of the foetus in the womb?
Give Reasons
The urethra is also called urinogenital duct.
Explain the Term Vas deferens.
Explain the term Cowper’s glands.
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Give Technical Term:
A method of contraception in which the sperm duct is cut and ligated.
Complete the following sentences with appropriate word:
Fertilization of the human egg by the sperm normally occurs in the_______
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Sperm is a highly motile male gamete.
Write a short note on fallopian tube.
In markets, eggs of birds are available but never eggs of dogs. why?
Fertilization takes place in ______.
What is the result of sperm entry into the secondary oocyte?
What role do secretions of the female genital tract play in capacitation?
