Embryogenesis and Ovum (AIPVT)
Embryogenesis, ovum structure, fertilization, and early developmental stages
Questions
What kind of eggs do human beings have?
- Microlecithal
- Mesolecithal
- Alecithal
- Macrolecithal
In which of the following organisms are centrolecithal eggs found?
- Reptiles
- Birds
- Tunicates
- Human beings
What is the process of discharging semen into female vagina called?
- Implantation
- Insemination
- Fertilisation
- Copulation
Where does fertilisation take place?
- Ovary
- Cervix
- Uterus
- Fallopian tube
The genetic material in ovum is stored in
- germinal spot
- ooplasm
- germinal vesicle
- vitelline membrane
Antifertilisin is secreted by the
- ovary
- ovum
- sperm
- vaginal wall
The first holoblastic cleavage in zygote leads to the formation of
- blastula
- blastomeres
- morula
- blastocoel
The outer membrane of ovum is known as
- plasma membrane
- zona pellucida
- corona radiata
- vitelline membrane
The first cleavage of zygote in embryonic development is called
- equatorial cleavage
- holoblastic vertical cleavage
- holoblastic horizontal cleavage
- radial cleavage
At which of the following stages does the embryo get implanted in the uterus?
- Blastula stage
- Zygote stage
- Morula stage
- Just after first cleavage
How is blastula different from morula?
- Presence of more cells
- Presence of more yolk
- Presence of cavity
- Absence of cavity
What is trophoblast?
- Cells forming embryo properly
- Flattened blastomeres at the surface of embryo
- Central cavity inside the morula
- Division products of zygote
The process of destabilisation of the acrosomal sperm head membrane allowing greater binding between sperm and oocyte is called
- fertilisation
- capacitation
- gastrulation
- copulation
Which of the following organs is/are ectodermic in origin?
- Spleen
- Kidneys
- Cornea of lens and eye
- Stomach
Which of the following statements is correct?
- Internal ear is derived from endoderm.
- Anterior lobe of pituitary is derived from ectoderm.
- Blood vascular system is derived from mesoderm.
- Tongue is derived from mesoderm.