What Is Implantation

Q.

What are the 3 stages of embryonic development?

Q.

How does the embryo get nourishment inside the mothers body? What is the placenta?

Q. Trophoblast and inner cell mass are the arrangements of blastomeres as outer and inner layers respectively in _______.

1. placenta
2. morula
3. zygote
4. blastocyst

Q.

Is cortisol helpful in parturition?

Q.

A test-tube baby means a baby born when

1. It is developed by tissue culture method.

2. The ovum is fertilised externally and thereafter implanted in the uterus.

3. It develops from a non-fertilised egg.

4. It is developed in a test tube.

Q.

Mention the function of trophoblast in the human embryo

Q.

Explain the role of placenta in the development of human embryo.

Q. After the release of secondary oocyte from the Graafian follicle, the Graafian follicle turns into corpus luteum. In case of a successful pregnancy, the corpus luteum continues to function as an endocrine gland

1. till the end of first week
2. till the end of first two weeks
3. till the end of first trimester
4. throughout the gestation period

Q.

Which hormone is responsible for maintenance of pregnancy?

Q. Which of the following is the site of implantation of blastocyst under normal conditions?

1. Endometrium
2. Infundibulum
3. Ampulla
4. Myometrium

Q.

Does fertilization happen in the oviduct.

Q.

At the time of implantation, the human embryo is called:

1. embryo

2. zygote

3. blastocyst

4. foetus

Q.

This is a diagrammatic representation of the ventral sectional view of the female reproductive system:

(i) Redraw the same on your answer sheet and then fill in and label the following parts:

1. Right ovary
2. Uterus
3. Placenta
4. Embryo
5. Amnion
6. Oviducal funnel.

(ii) State the function of the :

1. Placenta
2. Amniotic fluid

(iii) Using the symbol X indicates the region in the diagram where fertilization occurs.

Q.

In human beings, after fertilization, the structure which gets embedded in the wall of the uterus is

1. Ovum

2. Embryo

3. Blastocyst

4. Zygote

Q.

What happen if placenta is not formed during pregnancy?

Q.

What is the difference between the embryo and the placenta?

Q.

What are the placental abnormalities?

Q. Correct hormonal sequence in the case of menstruation is

1. oestrogen, FSH, progesterone
2. FSH, progesterone, oestrogen
3. oestrogen, progesterone, FSH
4. FSH, oestrogen, progesterone

Q.

Given below are events that lead to pregnancy and the development of the embryo.

1. Fertilization of egg
2. Maturation of egg
3. Release of egg
4. Embedding of the embryo in the thickened uterine wall.

Which of the following options gives the correct order of sequence in which they occur?

1. i, ii, iii, iv

2. ii, i, iii, iv

3. i, iv, ii, iii

4. ii, iii, i, iv

Q.

What is placenta? What is its importance?

Q. Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into

1. uterus
2. fallopian tube
3. fimbriae
4. cervix

Q.

Placenta is the name of vital connection between mother and embryo

1. True
2. False

Q.

Where does implantation of zygote take place in human females?

Q. Short / Long Answer question Type :
Describe embryonic development of a human baby up to the formation of three germ layers. Mention the fate of these germ layers in a tabular form.

Q. Explain the process of fertilization, development and birth in human beings.

Q.

Give biological explanation for the following. The placenta is an important structure for the development of a fetus.

Q. Short / Long Answer question Type :
Write short notes on Implantation

Q.

Which structure connects the placenta with embryo?

Q. Identify the human developmental stage shown here as well as the related correct place of its implantation in a normal pregnant woman, and select the right option for the two, together.

1. (a)
2. (b)
3. (c)
4. (d)

Q.

Choose the correct option with respect to the assertion and reason given.

Assertion [A]: Blastocyst burying itself within the uterine wall is known as implantation.

Reason [R]: Zona pellucida prevents the embryo from attaching to the wall of fallopian tube.

1. Both [A] and [R] are true but [R] is not a correct explanation to [A].

2. [A] is true and [R] is false.

3. [A] is false and [R] is true .

4. Both [A] and [R] are true and [R] is a correct explanation to [A].