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Question
Answer the following question.
What is capacitation? Give its importance.
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Solution
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.
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RELATED QUESTIONS
The middle piece of sperm provides:
Differentiate between:
Semen and sperm
Name the following:
Organ producing sperms.
Name the following:
Organ where fertilization occurs.
Give the functions of the following:
Fallopian tube
Give Reasons
The urethra is also called urinogenital duct.
Study the diagram given below and then answer the questions that follow:
(i) Name the part labeled A. Name any two hormones produced by the part labeled A.
(ii) What happens to the part labeled B.
(1) if fertilization takes place?
(2) If fertilization does not take place?
(iii) Where does fertilization occur?
(iv) Draw a neat diagram of the human sperm as seen under high magnification and label the following parts.
(1) Acrosome
(2) Mitochondria
Give Technical Term:
How much semen is discharged per ejaculation in a man?
Give scientific reason.
The new individual produced by sexual reproduction always has the recombined genes of both the parents.
Identify the function of fertilization membrane.
