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Test: Pregnancy and Embryonic Development (NCERT)


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15 Questions MCQ Test NCERTs at Fingertips: Textbooks, Tests & Solutions | Test: Pregnancy and Embryonic Development (NCERT)

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Test: Pregnancy and Embryonic Development (NCERT) - Question 1

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

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 1

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 2

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

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 2

Test: Pregnancy and Embryonic Development (NCERT) - Question 3

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

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 3

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 4

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 5

hCG, hPL and relaxin are produced in women

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 5

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 6

Fetus gets nourishment and oxygen through

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 6

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 7

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

Test: Pregnancy and Embryonic Development (NCERT) - Question 8

The main function of trophoectoderm in mammalian embryo is

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 8

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 9

Gastrula is the embryonic stage in which

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 9

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 10

Urine test during pregnancy determines the presence

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 10

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 11

The early stage human embryot distinctly possesses 

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 11

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 12

Structure connecting the foetus to placeiita is

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 12

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,.

Test: Pregnancy and Embryonic Development (NCERT) - Question 13

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

Detailed Solution for Test: Pregnancy and Embryonic Development (NCERT) - Question 13

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 14

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.

Test: Pregnancy and Embryonic Development (NCERT) - Question 15

Vertebral column is derived from

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