Where does fertilisation occur in humans? Explain the events that occur during this process. -Biology

Where does fertilisation occur in humans? Explain the events that occur during this process. -Biology
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In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (i) The sperm reaches the junction of ampulla and isthmus and comes in contact with zona pellucida layer of ovum. (ii) Acrosome of sperm head release sperm lysin enzymes that dissolves corona radiata and digests zona pellucida layer and enters cytoplasm. (iii) Entry of sperm stimulates secondary oocyte to complete its suspended second meiotic division, thus producing haploid egg or ovum and second polar body. (iv)Nucleus of sperm and of ovum fuses to form a diploid zygote.
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Last Answer : (i)In humans, the fertilisation of ovum takes place in ampullary-isthmic junction of Fallopian tube. The events that occur during the process of fertilisation are: (a) The sperm reaches the ... that blocks the entry of additional sperms. This ensures that only one sperm can fertilise an ovum

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The duration 19-21 days refers to: (1) incubation period of hen's egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

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Last Answer : (3) the period of menstrual cy-cle soon after menstruation, during which fertilisation is most likely to occur Explanation: The menstrual cycle is the scientific term for the physiological changes ... 21 days or more between a woman's shortest and longest cycle lengths is considered very irregular

The duration 19-21 days refers to: (1) incubation period of hen’s egg (2) average life-span of a red blood cell in humans (3) the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur (4) period of completion of one schizogony cycle of malarial parasite inside a red blood cell

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Last Answer : the period of menstrual cycle soon after menstruation, during which fertilisation is most likely to occur

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(a) IN WHICH PART OF HUMAN FEMALE REPRODUCTIVE SYSTEM DO THE FOLLOWING EVENTS TAKE PLACE. (i) RELEASE OF FIRST POLAR BODY (ii) RELEASE OF SECOND POLAR BODY (iii) FERTILISATION (iv) IMPLANTATION (b) NAME TWO HORMONES SECREATED ONLY DURING PREGNANCY.

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Last Answer : ANS (a) (i) OVARY (ii) FALLOPIAN TUBE (iii) AMPULLA-ISTHAMUS JUNCTION OF FALLOPIAN TUBE (iv) ENDOMETRIUM LINING OF UTERUS (b) HUMAN CHORIONIC GONADOTROPIN AND HUMAN PLACENTAL LACTOGEN

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Given below are the events that lead to pregnancy and development of embryo i. fertilisation of egg ii. maturation of egg iii. release of egg iv. embedding of embryo in uterus a) i, ii, iii, iv b)ii, i, iii, iv c)i, iv , ii, iii d)ii, iii, i , iv,

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