Reproduction System and Embryology Quiz-04

Reproduction System and Embryology Quiz-04

Dear Readers,

NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.   Which hormone level reaches peak during luteal phase of menstrual cycle?

•  Luteinizing harmone
•  Progesterone
•  Follicle stimulating harmone
•  Oestrogen

Solution
(b) During luteal phase of menstrual cycle, corpus luteum begins to secrete hormone called progesterone. The latter reaches its peak about 22nd day after the beinning of cycle. In this phase uterus linning thickens further and becomes secretory. This stages is meant for receiving the fertilized ovum (implantation)

Q2.   Cryptorchidism is a condition in which

•  Testis does not descend into scrotal sac
•  Sperm is not found
•  Male hormones are not reactive
•  Ovaries are removed

Solution
(a) The male humans, if testes fail to descend into the scrotal sac, it is called cryptorchidism.

Q3.   Correct sequence in development is

•  Fertilization → zygote → cleavage → morula → blastula → gastrula
•  Fertilization → zygotes → blastula → cleavage → gastrula
•  Fertilization → cleavage → morula → zygote → blastula
•  cleavage → zygote → morula → zygote → blastula

Solution
(a) Correct sequence in development is fertilisation (union of male of male and female gamete) ↓ Zygote (syngany or amphioxis) leads to the zygote) ↓ Cleavage (series of rapid mitotic division of the zygote) ↓ Morula (8-16 blastomere structure called morula having similar types of cells) ↓ Blastula (more than 16 blastomere (approx.-64) it is hollow structure With blastocoel cavity in center) ↓ Gastrula (Transformation of the blastocyst in the gastrula with primary germ layer by rearrangement a cell called gastrulation and structure is called gastrula)

Q4.   Ovum is

•  Secondary oocyte
•  Primary oocyte
•  Tertiary oocyte
•  None of these

Solution
(a) Ovum is a secondary oocyte which is released from mature Graafian follicle of an ovary

Q5.   Extraembryonic membranes, chorion and amnion are formed by

•  Inner mass cells
•  Trophoblast
•  Both (a) and (b)
•  None of these

Solution

Q6.   Inner portion of the seminiferous tubules contain

•  Male germ cell
•  Sertoli cells
•  Both (a) and (b)
•  Interstitial or leydig cell

Solution

Q7.   Largest egg is of

•  PPLO
•  Ostrich
•  Hydra
•  Periplaneta Americana

Solution
(b) Largest egg is of ostrich.

Q8.   The hormone that prepares and maintains the uterus during pregnancy is secreted by

•  Corpora cardiaca
•  Corpus luteum
•  Corpora albicans
•  Graafian follicle

Solution
(b) Corpus luteum secretes the hormone progesterone, which prepares and maintains the uterus during pregnancy.

Q9.   The part of fallopian tube closest to the ovary is

•  Isthmus
•  Infundibulum
•  Cervix
•  Ampulla

Solution
(b) The part of fallopian tube closer to the ovary is funnel-shaped infundibulum, which help in collection of the ovum after ovulation.

Q10.   The 60% of semen is produced by the

•  Prostate gland
•  Seminal vesicle
•  Cowper’s gland
•  Testes

Solution
(b) Seminal vesicle produce 60% of the semen and gives alkaline medium to the sperm for the nutralisation of vaginal acidic medium