Human Reproduction Test

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Human Reproduction Test - 7

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Weekly Quiz Competition

Question 1
4 / -1

In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was.

A
high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo

B
high level of circulating hCG to stimulate endometrial thickening

C
high levels of FSH and LH in uterus to stimulate endometrial thickening

D
high level of circulating hCG to stimulate estrogen and progesterone synthesis

Solution

Placenta acts as an endocrine gland during pregnancy and produces several hormones including human chorionic gonadotropin (hCG), estrogen, progesterone, etc. hCG stimulates the corpus luteum to secrete progesterone.
Question 2
4 / -1

Identify the correctly matched pair/pairs of the germ layers and their derivatives
A. Ectoderm-Epidermis
B. Endoderm-Dermis
C. Mesoderm-Muscles
D. Mesoderm-Notochord
E. Endoderm-Enamel of teeth

A
A and D

B
A and B

C
A, C and D

D
A, B, C and E

Solution
Question 3
4 / -1

Which of the following hormones is not a secretion product of human placenta?

A
Human chorionic gonadotropin

B
Prolactin

C
Estrogen

D
Progesterone

Solution

Prolactin is secreted by the anterior lobe of pituitary gland. After parturition, secretion and storage of milk in mammary glands is under the influence of this hormone.
Question 4
4 / -1

Fill in the blanks in the given statement and select the correct option.
A. The developmental stage of an animal passed in the mother's womb is called (i) .
B. The outer layer of blastula is called (ii) . It does not take part in the formation of (iii) .
C. (iv) is the first germ layer formed from the inner cell mass by differentiation.

A
(ii)-mesoderm, (iii)-embryo proper (iv)-ectoderm

B
(i)-embryo, (ii)-trophoblast, (iii) embryo proper

C
(i)-egg, (iv)-endoderm

D
(i)-embryo, (iv)-ectoderm
Question 5
4 / -1

hCG, hPL and relaxin are produced in women

A
at the time of puberty

B
only during pregnancy

C
at the time of menopause

D
during menstruation

Solution

During pregnancy, placenta acts as an endocrine gland and secretes some hormones such as estrogen, progesterone, human chorionic gonadotropin (hCG), human placental lactogen (hPL), chorionic thyrotropin, chorionic corticotropin and relaxin.
Question 6
4 / -1

Fetus gets nourishment and oxygen through

A
allantois

B
placenta

C
yolk sac

D
chorion

Solution

Placenta is an intimate connection between the fetus and uterine wall of the mother to exchange the materials. Food materials and oxygen pass from the mother's blood into the fetal blood and fetal excretory products diffuse into maternal blood through placenta.
Question 7
4 / -1

Identify the labelled parts A−D in the given figure of human foetus within the uterus.

A
a

B
b

C
c

D
d
Question 8
4 / -1

The main function of trophoectoderm in mammalian embryo is

A
formation of future endoderm

B
formation of the body of developing embryo

C
formation of future ectoderm

D
formation of placenta

Solution

During embryonic development, the blastocyst formed consists of an outer envelope of cells called the trophoblast and the inner cell mass. The cells of trophoblast form chorion and amnion and hence part of placenta.
Question 9
4 / -1

Gastrula is the embryonic stage in which

A
cleavage occurs

B
blastocoel form

C
germinal layers form

D
villi form

Solution

Transformation of the blastocyst into gastrula with primary germ layers by rearrangement of the cells is called gastrulation. In all the triploblastic animals three germ layers-ectoderm, mesoderm and endoderm are formed by characteristic morphogenetic movements.
Question 10
4 / -1

Urine test during pregnancy determines the presence

A
human chorionic gonadotropin hormone

B
estrogen

C
progesterone

D
luteinising hormone

Solution

During pregnancy, human chorionic gonadotropin hormone is released by trophoblastic cells which passes out in urine. Thus, if this hormone appears in urine test, it means the woman is pregnant. This hormone maintains the corpus luteum and stimulates it to secrete progesterone which is required for the maintenance of the uterus.
Question 11
4 / -1

The early stage human embryot distinctly possesses

A
gills

B
gill slits

C
external ear(pinna)

D
eyebrows

Solution

Early human embryo possesses a dorsal hollow nerve cord, a well developed notochord and a series of gill slits, which represent the fundamental chordate characters.
Question 12
4 / -1

Structure connecting the foetus to placeiita is

A
umbilical cord

B
amnion

C
yolk sac

D
chorion

Solution

Umbilical cord is a narrow. Tube like structure that connects the fetus to the placenta. Through this tube, nutrients and oxygen are supplied from the mother to the baby and waste products are removed from the baby,.
Question 13
4 / -1

During the development of embryo, which of the following occurs first?

A
Differentiation of organ

B
Differentiation of tissue

C
Differentiation of organ system

D
Differentiation of cells

Solution

After fertilisation, the zygote undergoes the process of cleavage to form a number of cells which ultimately undergo the process of differentiation and then form tissues, organ and lastly organ systems.
Question 14
4 / -1

Select the option that correctly fills up the blanks in the given paragraph.
After one month of pregnancy, the embryo's (i) is formed. By the end of the (ii) month of pregnancy, the fetus develops limbs and digits. By the end of (iii). most of the major organ systems are formed, for example, the limbs and external genital organs are well-developed. By the end of (iv). the body is covered with fine hair, eye-lids separate, and eyelashes are formed.

A
(i) - heart, (ii) - second, (iii) - first trimester, (iv) - second trimester

B
(i) - heart, (ii) - second, (iii) - first month, (iv) - second month

C
(i) - heart, (ii) - second, (iii) - first week, (iv) - second week

D
(i) - heart, (ii) - fourth, (iii) - first trimester, (iv) - second trimester
Question 15
4 / -1

Vertebral column is derived from

A
ectoderm

B
nerve chord

C
endoderm

D
notochord

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Re-Attempt Weekly Quiz Competition

Human Reproduction Test - 7

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Human Reproduction Test - 7

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SHARING IS CARING

Question 1

high level of circulating FSH and LH in the uterus to stimulate implantation of the embryo

high level of circulating hCG to stimulate endometrial thickening

high levels of FSH and LH in uterus to stimulate endometrial thickening

high level of circulating hCG to stimulate estrogen and progesterone synthesis

Solution

Question 2

A and D

A and B

A, C and D

A, B, C and E

Solution

Question 3

Human chorionic gonadotropin

Prolactin

Estrogen

Progesterone

Solution

Question 4

(ii)-mesoderm, (iii)-embryo proper (iv)-ectoderm

(i)-embryo, (ii)-trophoblast, (iii) embryo proper

(i)-egg, (iv)-endoderm

(i)-embryo, (iv)-ectoderm

Question 5

at the time of puberty

only during pregnancy

at the time of menopause

during menstruation

Solution

Question 6

allantois

placenta

yolk sac

chorion

Solution

Question 7

a

b

c

d

Question 8

formation of future endoderm

formation of the body of developing embryo

formation of future ectoderm

formation of placenta

Solution

Question 9

cleavage occurs

blastocoel form

germinal layers form

villi form

Solution

Question 10

human chorionic gonadotropin hormone

estrogen

progesterone

luteinising hormone

Solution

Question 11

gills

gill slits

external ear(pinna)

eyebrows

Solution

Question 12

umbilical cord

amnion

yolk sac

chorion

Solution

Question 13

Differentiation of organ