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Choose the incorrect statement from the following:
(c) 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 additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.
Identify the correct statement from the following:
(d)
– Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge.
– Oogenesis is initiated during the embryonic development stage when a couple of million gamete mother cells (oogonia) are formed within each fetal ovary (about third month of foetal ovary), no more oogonia are formed and added after birth.
– In the head of epididymis sperms undergo physiological maturation, acquiring increased motility and fertilizing capacity.
Spot the odd one out from the following structures with reference to the male reproductive system
(d)
– Male reproductive system contain rete testis, vasa efferentia, Epididymis and vas deferens etc.
– Female reproductive system contain isthmus, ampulla, infundibulum and uterus etc.
Seminal plasma, the fluid part of semen, is contributed by
i. Seminal vesicle
ii. Prostate
iii. Urethra
iv. Bulbourethral gland
(b) Secretion of seminal vesicle (paired), prostate gland (unpaired) and bulbourethral glands or Cowper’s glands (paired) constitute the seminal plasma which is rich in fructose, calcium and certain enzymes.
Spermiation is the process of the release of sperms from
(a) \(
\begin{array}{|l|l|}
\hline \text { Spermiation } & \begin{array}{l}
\text { Process of the release of sperms from seminiferous } \\
\text { tubules. }
\end{array} \\
\hline \text { Gametogenesis } & \text { Formation of gametes } \\
\hline \text { Insemination } & \text { Transfer of sperms into the female genital tract } \\
\hline \text { Fertilisation } & \text { Fusion of male and female gametes } \\
\hline \text { Implantation } & \text { Attachment of blastocyst to the uterine wall } \\
\hline \text { Gestation } & \text { Embryonic development } \\
\hline \text { Parturition } & \text { Delivery of baby CBSELabs.com } \\
\hline
\end{array}
\)
Mature Graafian follicle is generally present in the ovary of a healthy human female around
(b) Mature Graafian follicle is generally present in the ovary of a healthy human female around 1117 day of menstrual cycle.
Acrosomal reaction of the sperm occurs due to
(a) Acrosome reaction in sperm is triggered by release of fertilizin. The secretions of the acrosome help the sperm enter into the cytoplasm of the ovum through the zona pellucida and the plasma membrane.
Which one of the following is not a male accessory gland?
(b)
– Male accessory gland are seminal vesicle, prostate gland and bulbourethral gland.
– Ampulla is a part of .female reproductive system.
The spermatogonia undergo division to produce sperms by the process of spermatogenesis. Choose the correct one with reference to above.
(c)
– Secondary spermatocytes have 23 chromosomes and undergo second meiotic division.
– Spermatogonia have 46 chromosomes and always undergo mitotic cell division.
– Primary spermatocytes divide by meiotic cell division.
– Spermatids are transformed into spermatozoa.
Match between the following representing parts of the sperm and their functions and choose the correct option.
\(
\begin{array}{|l|l|r|l|}
\hline & { Column A } & & { Column B } \\
\hline A. & \text { Head } & i. & \text { Enzymes }\\
\hline B. & \text { Middle piece } & ii. & \text { Sperm motility } \\
\hline C. & \text { Acrosome } & iii. & \text { Energy } \\
\hline D. & \text { Tail } & iv. & \text { Genetic material } \\
\hline
\end{array}
\)
(b)
Which among the following has 23 chromosomes?
(c) Secondary oocyte ( \(\mathrm{n}=23\) )
Match the following and choose the correct options:
\(
\begin{array}{|l|l|l|l|}
\hline \text { A. } & \text { Trophoblast } & \text { i. } & \begin{array}{l}
\text { Embedding of blastocyst in the } \\
\text { endometrium }
\end{array} \\
\hline \text { B. } & \begin{array}{l}
\text { Cleavage } \\
\end{array} & \text { ii. } & \begin{array}{l}
\text { Group of cells that would differentiate as } \\
\text { embryo }
\end{array} \\
\hline \text { C. } & \text { Inner cell mass } & \text { iii. } & \begin{array}{l}
\text { Outer layer of blastocyst attached to the } \\
\text { endometrium }
\end{array} \\
\hline \text { D. } & \text { Implantation } & \text { iv. } & \text { Mitotic division of zygote } \\
\hline
\end{array}
\)
(b)
Which of the following hormones is not secreted by human placenta?
(d)
– Placenta acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progestogens, etc.
– LH is secreted by pituitary gland.
The vas deferens receives duct from the seminal vesicle and opens into urethra as
(b) The vas deferens receives duct from the seminal vesicle and opens into urethra as ejaculatory duct.
Urethral meatus refers to the
(c) The urethra originates from the urinary bladder and extends through the penis to its external opening called urethral meatus (external opening of the urinogenital duct).
Morula is a developmental stage
(a) The embryo with 8 to 16 blastomeres is called a morula. Morula is the solid mass of cells and is mulberry like. Morula is a developmental stage between the zygote and blastocyst.
The membranous cover of the ovum at ovulation is
(a) The membranous cover of the ovum at ovulation is corona radiata.
Identify the odd one from the following:
(a) Fimbriae, infundibulum’isthmus and ampulla are the part of fallopian duct while labia minora is female external genitalia.
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