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4

Most of major organs of human embryo are formed by the

A. 16th week of pregnancy

B. 15th week of pregnancy

C. 14th week of pregnancy

D. 12th week of pregnancy

Correct Answer :

D. 12th week of pregnancy


Related Questions

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Which part of the foetus is developed from mesoderm?

A. Heart and notochord

B. Heart and brain

C. Spinal cord and notochord

D. Brain and notochord

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When is the best time to get FSH levels checked?

A. Day 7 of the menstrual cycle

B. Day 21 of the menstrual cycle

C. Day 3 of the menstrual cycle

D. Day 14 of the menstrual cycle

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Part of fallopian tube closest to ovary is

A. Infundibulum

B. Cervix

C. Ampulla

D. Isthmus

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Haemophilic man marries a normal woman. Their off springs will be

A. All haemophilic

B. All boys haemophilic

C. All girls haemophilic

D. All normal

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Human female reaches menopause at the age of about ...

A. 25 years

B. 35 years

C. 50 years

D. 70 years

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Highly sophisticated procedure of injecting sperm directly into the ovum is

A. GIFT

B. ZIFT

C. ICSI

D. IUI

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In menstrual cycle the secretory phase is also known as

A. luteal phase and lasts for 6 days

B. Luteal phase and lasts for 13 days

C. Follicular phase and lasts for 13 days

D. Follicular phase and lasts for 6 days

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Thick layer which surrounds the ovum is ...

A. Zona pellucida

B. Membrana granulosa

C. Corona radiata

D. Theca interna

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The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the:

A. Capacitor

B. Head

C. Corona

D. Acrosome

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Gestation period of 280 days is calculated from time of ...

A. Last menstruation

B. Fertilization

C. First day of last menstruation

D. Ovulation

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Correct sequence of hormone secretion from beginning of menstruation is ...

A. FSH, progesterone, estrogen

B. Estrogen, fsh, progesterone

C. FSH, estrogen, progesterone

D. Estrogen, progesterone, FSH

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After fertilization, implantation of human embryo takes place on

A. 10 th day

B. 14 th day

C. 7 th day

D. 3 rd day

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During ovulation, for favourable sperm travel oestrogen causes

A. Cervical mucus to become stretchy and clear

B. Less cervical mucus production

C. Tenderness of cervix

D. Slight vaginal bleeding

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Which part of the ovary act as an endocrine gland in human beings

A. Stroma

B. Vitteline membrane

C. Graffian follicle

D. Epithelium

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Which one occurs first in the human embryo

A. Neurogenesis

B. Cardiogenesis

C. Hepatogenesis

D. Osteogesis

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The embryonic stage that resembles a mulberry fruit is

A. Nerula

B. Gastrula

C. Morula

D. Blastula

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Number of chromosomes in secondary oocyte stage in humans is ...

A. 23

B. 46

C. 18

D. 20

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Corona radiata is held by...

A. Mucopolysaccharide

B. Oligosaccharide

C. Lipopolysaccharide

D. Lipoprotein

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What are the chances of a normal fertile couple having a baby in one year?

A. 40%

B. 80%

C. 20%

D. 50%

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Human embryo is referred to as fetus from beginning of

A. 1st month of pregnancy

B. 2nd month of pregnancy

C. 3rd month of pregnancy

D. 4th month of pregnancy

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Most of major organs of human embryo are formed by the

A. 16th week of pregnancy

B. 15th week of pregnancy

C. 14th week of pregnancy

D. 12th week of pregnancy

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4

Combined Oral contraceptives prevent pregnancy by

A. Tubal block

B. Preventing spermatogenesis

C. Forming a barrier between the ovum and sperm

D. Suppressing ovulation

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Immediately after ovulation, the ovum is covered by a membrane called

A. Chorion

B. Zona pellucida

C. Corona radiata

D. Vitelline membrane

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Pregnancy begins with implantation of

A. Embryo

B. Fertilized ovum

C. Blastopore

D. Blastocyst

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Approximately how long does it take for a spermatocyte to complete its differentiation into a spermatozoan in the testis?

A. 7 days

B. 70 days

C. 7 months

D. 70 hours

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Decreased motility of sperm <40 % is known as

A. Azoospermia

B. Oligospermia

C. Asthenozoospermia

D. Necrozoospermia

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In human embryo, the digestive system develops from the

A. Epithelium

B. Mesoderm

C. Endoderm

D. Ectoderm

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The three primary germ layers, ectoderm, endoderm and mesoderm are differentiated during

A. Blastulation

B. Neurulation

C. Gastrulation

D. Organogenesis

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Which one takes part in formation of placenta? ...

A. Only trophoblast

B. Only allantois

C. Trophoblast and mesoderm

D. Trophoblast and mesoderm and allantois

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Membrane that gives protection to embryo from external shocks is

A. Amnion

B. Allantois

C. Chorion

D. Placenta