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What happens during fertilisation in humans after many sperms reach close to the ovum?

Cells of corona radiata trap all the sperms except one
Only two sperms nearest the ovum penetrate zona pellucida
Secretions of acrosome helps one sperm enter cytoplasm of ovum through zona pellucida
All sperms except the one nearest to the ovum lose their tails
Additional Questions

Column I contains terms and column II contains definitions. Match them correctly and choose the right answer.

 Column I Column II
AParturitionpAttachment of zygote to endometrium
BGestationqRelease of egg from Graafian follicle
COvulationrDelivery of baby from uterus
DImplantationsDuration between pregnancy and birth
EConceptiontFormation of zygote by fusion of the egg and sperm
uStoppage of ovulation and menstruation

Answer

Ovulation in the human female normally takes place during the menstrual cycle

Answer

The figure given below depicts a diagrammatic sectional view of the female reproductive system of humans.Which one set of three parts out of I – VI have been correctly identified?
female reproductive system

Answer

Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled A, B, C, D.
male reproductive system

 ABCD
(1)UreterSeminal vesicleProstateBulbourethral gland
(2)UreterProstateSeminal vesicleBulbourethral gland
(3)Vas deferensSeminal vesicleProstateBulbourethral gland
(4)Vas deferensSeminal vesicleBulbourethral glandProstate

Answer

The Leydig cells as found in the human body are the secretory source of

Answer

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was

Answer

Signals for parturition originate from

Answer

Which one of the following statements is false in respect of viability of mammalian sperm?

Answer

The endocrine structure and the corresponding hormones are listed in the table below. Match the columns and select the correct option.

Column IColumn II
(a) Hypothalamus(p) Relaxin
(b) Anterior Pituitary(q) Estrogen
(c) Testis(r) FSH and LH
(d) Ovary(s) Androgens
(t) Gonadotropin releasing hormone

Answer

Hormones and their functions are listed in the table below. Match the columns and select the correct option.

Column IColumn II
(a) Oxytocin(p) Stimulates ovulation
(b) Prolactin(q) Implantation and maintenance of pregnancy
(c) Luteinizing hormone(r) Lactation after child birth
(d) Progesterone(s) Uterine contraction during labour
(t) Reabsorption of water by Nephrons

Answer
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