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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

Correct Answer :

D. Acrosome


Related Questions

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What is the best sperm extraction technique for men with obstructive azoospermia?

A. TESE - Microsurgical testicular sperm extraction

B. Percutaneous Epididymal Sperm Aspiration (PESA)

C. Intra cytoplasmic sperm injection ( ICSI)

D. Fine needle aspiration

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Fertilization of the ovum takes place in

A. Ovary

B. Uterus

C. Fallopian tube ampulla

D. Cervix

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Layers of ovum from outside to inside are .

A. Corona radiata, zona pellucida, vitelline membrane

B. Zona pellucida, corona radiata, vitelline membrane

C. Vitelline membrane, zona pellucida, corona radiata

D. Zona pellucida, vitelline membrane, corona radiate

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Pregnancy begins with implantation of

A. Embryo

B. Fertilized ovum

C. Blastopore

D. Blastocyst

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Part of fallopian tube closest to ovary is

A. Infundibulum

B. Cervix

C. Ampulla

D. Isthmus

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Which one of the following is produced early in the life of a human female?

A. Relaxin

B. Oxytocin

C. Prolactin

D. Progesterone

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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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Mammary glands are modification of ...

A. Sebaceous glands

B. Sweat glands

C. Meibomian glands

D. None of the above

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In humans female ovulation occurs during menstrual cycle

A. At the end of proliferative phase

B. At the beginning of proliferative phase

C. Before the end of secretary phase

D. In the middle of secretary phase

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Embryonic connective tissue is formed from ..

A. ectoderm

B. endoderm

C. Mesenchyme

D. Mesogloea

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In uterus, endometrium proliferates in response to ...

A. Relaxin

B. Oxytocin

C. Progesterone

D. Oestrogen

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After ovulation graffian follicles turns into

A. Corpus luteum

B. Corpus albicans

C. Corpus callosum

D. Corpus artesia

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Prostate gland produces a secretion for ...

A. Attracting sperms

B. Stimulating sperm activity

C. Inhibiting sperm activity

D. None of the above

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Correct sequence in embryonic development is ..

A. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula

B. Fertilization -> zygote -> cleavage -> blastula -> morula -> gastrula

C. Fertilization -> zygote -> cleavage -> morula -> blastula -> gastrula

D. Fertilization -> zygote -> gastrulae -> morula -> blastula -> cleavage

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Failure of the brain to grow in the foetus may result in:

A. Plagiocephaly

B. Craniostenosis

C. Anencephaly

D. Microcephaly

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Fimbriae of fallopian tube ...

A. Release ovum from graffian follicle

B. Cause endometrial changes for implantation

C. Help develop corpus luteum

D. Help collection of ovum after ovulation

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The hormone responsible for enlargement of mammary glands at puberty is

A. Progesterone

B. Oestrogen

C. Testosterone

D. Oxytocin

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A child's blood group is 'o'. The parent's blood groups cannot be

A. A AND B

B. A AND A

C. AB AND O

D. B AND O

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Acrosome of sperm contains ...

A. Hyaluronidase and acrosin

B. Hyaluronic acid and acrosin

C. Hippuric acid and uric acid

D. Testosterone

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Which cells provide nutrition to the sperms?

A. Sertoli cells

B. Leydig cells

C. Crypt cells

D. Semniferous tubules

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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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Cell division that occurs in zygote is called

A. meiosis

B. Mitosis

C. Cleavage

D. Differentiation

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Membrane that gives protection to embryo from external shocks is

A. Amnion

B. Allantois

C. Chorion

D. Placenta

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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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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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Thick layer which surrounds the ovum is ...

A. Zona pellucida

B. Membrana granulosa

C. Corona radiata

D. Theca interna

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Which one is not the function of human placenta

A. Helps co2 and excretory products pass from foetus to mother's body

B. Helps o2 and nutrients from mother's body enter the foetus

C. Secretes hormones

D. It protects foetus from mechanical shocks

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Fertility in women may be impaired by

A. Hypertension

B. Gall stones

C. Obesity

D. Short stature

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The gonadotropic hormones are secreted by

A. Anterior pituitary

B. Posterior pituitary

C. Adrenals

D. Ovaries

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The number and appearance of chromosomes in the nucleus of a eukaryotic cell is called as

A. Karyotype

B. Genotype

C. Phenotype

D. Cytogenetics