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Fertilisation in humans is practically f...

Fertilisation in humans is practically feasible only if
i.The ovum and sperm are transported simultaneously to ampullary-isthmic junction of the cervix.
ii.The sperm are transported into cervix within 48 hours of release of ovum in uterus.
iii.The sperm are transported into vagina just after the release of ovum in fallopian tube.
iv.The ovum and sperm are transported simultaneously to ampullary-isthmic junction of the fallopian tube.

A

The sperms are transported into cervix within 48 hrs of release of ovum in uterus

B

The sperms are tranported into just after the release of ovum in fallopin tube

C

The ovum and sperm are transproted simultanecusly to ampullay - isthmic juction of the fallopain tube

D

The ovum and sperms are transproted simultaneously to ampullary - isthmic junction of the cervix

Text Solution

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The correct Answer is:
C
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Explore conceptually related problems

A : All copulations do not lead to fertilisation and pregnancy . R : Fertillsation can occur if the ovum and sperms are transported simultaneously to the ampullary - isthmic junction

Assertion: All copulations do not lead to the fertilisation and pregnancy. Reason: Fertilisation can occur only if the ovum and sperms are transported simultaneously to the ampullary isthmic junction.

Ovum released from ovary and is transported to the fallopian tube for fertilisation . Trace the correct path the egg and embryo takes from ovary to uterus .

Which of the following statements regarding fertilization is/are correct ? (i) The acrosome is filled with hydrolytic enzymes which help in dissolving the membrane of the ovum at the time of fertilization. (ii) Vitelline membrane is the first membrane to be faced by sperms while trying to fuse with the ovum . (iii) There must be synchronicity in the release of ovum and entry of sperm for the formation of zygote . (iv) The meiotic division of the secondary oocyte is concluded with the entry of male gamete.

Fill up the blanks in the following paragraph by selecting the correct option. During copulation (coitus) semen is released by the penis into the vagina and is called (i)._____.the ovum released by the ovary is transported to the (ii)._____where (iii).______takes place during fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of (iv)._____The secretions of the (v)._____help the sperm enter into the cytoplasm of the ovum.

which of the following statements regarding fertilization and implantation are incorrect ? I. During fertilization , a sperm first comes in contact with the corona radiata cells produced by the ovum. II. Fertilization occurs only if sperm and ovum are simultaneously transported to the ampullary region. III. Implantation occurs about 7 days after fertilization . IV. The continuous division of morula leads to the formation of zygote.

The figure given below represents the female reproductive system of a mammal. Parts indicated by the guidelines A to D are as follows: (A) Uterus (B) Fallopian tube (oviduct) (C) Ovary (D) Vagina (a) Give appropriate terms for each of the following: (i) The onset of reproductive phase in a young female. (ii) Rupture of follicle and release of ovum from the ovary (iii) Monthly discharge of blood and disintegrated tissues in human female. (iv) Process of fusion of ovum and sperm. (v) Fixing of developing zygote on the uterine wall. (vi) The permanent stoppage of menstruation at about the age of 45 years in a female. (b) State the functions of the (0) Placenta (ii) Amniotic fluid. [ICSE 2004, 2015] (c) Using the symbol "X' indicates the region in the diagram where fertilisation occurs.[ICSE 2004)

Given below is a diagram of the reproductive system of a human female : (i) Name the parts numbered 1-6. (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 fertilisation of the egg up to the birth of the baby?

Fill up the blanks in the following paragraph by selecting the correct option A. overset("i")("___") methods work on the principle of avoiding chances of ovum and sperms meeting B. overset("ii")("___") is one such method in which the couples avoid coitus from day 10 to 17 of the menstrual cycle C. overset("iii")("___") is another method in which the male partner withdraws his penis from the vagina just before ejaculation so as to avoid insemination D. overset("iv")("___") method is based on the fact that ovulation and therefore the cycle do not occur during the period of intense loctation following parturition.

Match column I (terms) with column II (definitions) and select the correct option from the codes given below. {:(,"Column I",,"Column II"),((A),"Parturition",(i),"Attachment of embryo to endometrium"),((B),"Gestation",(ii),"Release of ovum from Graafian follicle"),((C),"Ovulation",(iii),"Delivery of baby from uterus"),((D),"Implantation",(iv),"Duration between pregnancy and birth"),((E),"Conception",(v),"Fomation of zygote by fusion of the ovum and sperm"),(,,,"Stoppage of ovulation and menstruation"):}

AAKASH INSTITUTE ENGLISH-HUMAN REPRODUCTION-Assignment ( Section - C ) (Previous Type Question )
  1. Match column I with column II and select the correct option using the ...

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  2. Several hormones like hCG, hPL , estrogen, progesterone are produced b...

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  3. Fertilisation in humans is practically feasible only if i.The ovum an...

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  4. Identify the correct statement on 'inhibin'

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  5. Changes in GnRH pulse frequency in females is controlled by circulatin...

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  6. Select the incorrect statement

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  7. Ectopic pregnancies are referred to as

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  8. Which of the following events is not associated with ovulation in huma...

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  9. In human females, meiosis-II is not completed until

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  10. Which of the following layers in an antral follicle is acellular?

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  11. Which of these is not an important component of initiation of parturit...

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  12. Capacitation refers to changes in the

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  13. Hysterectomy is surgical removal of i. Uterus ii. Prostate gland ...

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  14. Which of the following cells during gametogenesis is normally diploid?

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  15. The main function fo mammalian corpus luteum is to produce

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  16. Menstrual flow occurs due to lack of

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  17. What is the correct sequence of sperm formation?

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  18. Which one of the following is not the func- tion of placenta? It

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  19. In a normal pregnant woman, the amount of total gonadotropin activity ...

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  20. Singnals for partiurition originate from

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