An oocyte is released from the ovary under the influence of LH
After completing meiosis and before polar body are released
After completing meiosis I and before release of polar body
After completing meiosis
After completing meiosis I and after release of polar body
Both corpus luteum and macula lutea are
found in human ovaries
a source of hormones
characterized by a yellow colour
contributory in maintaining pregnancy.
Which one of the following statements with regard to embryonic development in humans
is correct?
sooner than the second.
Cleavage divisions bring about considerable increase in the mass of protoplasm.
In the second cleavage division, one of the two blastomeres usually divides a little
With more cleavage divisions, the resultant blastomeres become larger and larger.
Cleavage division results in a hollow ball of cells called morula
Women who consumed the drug thalidomide for relief from vomiting during early months
of pregnancy gave birth to children with
No spleen
Harelip
Extra fingers and toes
Underdeveloped limbs
Which one of the following events is correctly matched with the time period in a normal menstrual cycle?
Release of egg : 5th day
Endometrium regenerates : 5 - 10 days
Endometrium secretes nutrients for implantation : 11-18 days
Rise in progesterone level : 1 - 15 days
Which of the following is true regarding sperm?
Fertilizin : For penetrating egg membrane
Hyaluronidase : For penetrating egg membrane
Acrosin : Dissolves corona radiata
Capacitation : Takes place in penis
Acrosome reaction in sperm is triggered by
capacitation
release of lysin
influx of Ca++
release of fertilizin
How many sperms are formed from a secondary spermatocyte?
4
8
2
1
What do A, B, C and D represent?
A B C D
Infundibulum Fertilization Myometrium Morula
Infundibulum Fertilization Endometrium Blastocyst
Isthmus Fertilization Myometrium Blastocyst
Isthmus Fertilization Endometrium Morula
The 'cells of Rauber' are
secretory cells of endometrium in uterus
inner cell mass of blastocoel
outer cells of trophoblast in contact with uterine wall
cells of trophoblast, in contact with inner cell mass of blastocyst.
Choose the correct statement.
hPL plays a major role in parturition
Foetus shows movements first time in the 7th month of pregnance
Signal for parturition comes from fully developed foetus and placenta
Embryo's heart is formed by the 2nd month of pregnancy
Starting from the maximum, arrange the following male reproductive accessory organs in the correct order, based on the amount of secretion poured into urethra
(i) Prostrate gland
(ii) Seminal vesicle
(iii) Bulbourethral gland
(i) > (ii) > (iii)
(iii) > (ii) > (i)
(ii) > (iii) > (i)
(ii) > (i) > (iii)
During menstrual cycle, levels of LH and estrogen are highest around
14th day
21st day
7th day
28th day
Hormones for the menstrual cycle are produced by
ovaries only
uterus only
ovaries and anterior pitutory
Select the correct explanation for the labels A, B, C and D.
A represents the fertilized zygote.
B represents the stage of morula formation.
C represents the blastocyst.
D represents the blastocyst implantation.
Which of the following statements is correct regarding menstrual cycle?
LH induces rupturing of Graafian follicle.
Proliferative phase is characterised by the increased production of progesterone.
Corpus luteum secretes large amount of estrogen.
Both LH and FSH attain a peak level in secretory phase.
Refer to the given figure and choose the correct option regarding its parts labelled as A-F.
() B-Graafian follicle, F-Corpus luteum
() C-Graafian follicle, A-Ovum
() B-Primary follicle, C-Tertiary follicle showing antrum
() E-Corpus callosum, D-Antrum cavity
During pregnancy, which of the following is secreted through the urine of mother ?
Progesterone
Luteinising hormone
FSH
Human chorionic gonadotropic hormone
The fluid which is rich in calcium fibrinolysin and acid phosphatase and contributes about 30% of the total volume of semen, is released by
Cowper's glands
prostate gland
seminal vesicles
epididymis
Correct hormonal sequence in the case of menstruation as
oestrogen, FSH, progesterone
Oestrogen, progesterone, FSH
FSH, progesterone, oestrogen
FSH, oestrogen, progesterone
Atretic follicles are found in the
fallopian tubes
uterus
labia majora
ovary
Which of the following induces parturition?
Vasopressin
Oxytocin
GH
TSH
Among the following stem cells, which are found in the umblical cord?
Adult stem cells
Cord blood stem cells
All of the above
Which of the following hormones is secreted by implanted blastocyst, that acts on the corpus luteum in the ovary, stimulating the body to produce estrogens and progesterone to maintain the uterine lining?
HCG
From which of the embryological germ layers is the epithelial tissue derived
(I) ectoderm
(II) mesoderm
(III) endoderm
I & II are correct
I & III are correct
II & III are correct
I & II & III are correct
Assertion : Embryonic development proves interrelationship and common ancestory of metazoans.
Reason : It involves similar sequence of five dynamic processes during development.
Assertion : There is generally monospermy in most of animals.
Reason : Vitelline membrane of ovum checks polyspermy.
Assertion : Penetration of sperm into ovum is a chemical process.
Reason : Acrosome of sperm secretes a lytic enzyme hyaluronidase which dissolves vitelline membrane of ovum.
Assertion : Cleavage is also called fractionating process.
Reason : In cleavage, number of blastomeres increases but size of blastomears decreases.
Assertion : Nuclear-cytoplasmic ratio decreases in cleavage.
Reason : During cleavage, cytoplasmic synthesis is faster than DNA synthesis.
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