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Reproduction System and Embryology Quiz-01

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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.   The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for
  •  Escaping any possible compression by the visceral organs
  •  Providing more space for the growth of epididymis
  •  Providing a secondary sexual feature for exhibiting the male sex
  •  Maintaining the scrotal temperature lower than the internal body temperature
Solution
(d) The testes in humans are situated outside the abdominal cavity in scrotal sacs. This is because the temperature of scrotal sac is 25℃ lesss than internal body temperature.

Q2.   The extra-embryonic membranes of mammalian embryo are derived from
  •  Trophoblast
  •  Follicle cells
  •  Formative cells
  •  Inner cell mass
Solution
(a) Trophoblast ia an epithelium surrounding the mammalian blastocyst forming outer layer of chorion and becoming part of the embryonic component of extra-embryonic membranes.

Q3.   Which of the following provides nutrition to sperm?
  •  Leydig’s cell
  •  Scrotum
  •  Sertoli’s cell
  •  Epididymis
Solution
(c) Sertoli’s cell provide nutrition to the sperm in testes.

Q4.   Rapid secretion of LH in ovulation causes
  •  Repturing of Graafian follicle
  •  Releasing of ove
  •  Ovulation
  •  All of the above
Solution
(d) In the ovulatory phase, both LH and FSH attain a peak level in middle of cycle (about 14 day). Rapid secretion of LH induces rupturing of Graafian follicle and thereby releasing the ovum in human beings (secondary oocyte is released). This is called ovulation. Infact increase level of LH causes ovulation

Q5.   Which of the following cells present in the mammalian testis and nourishes the sperm?
  •  Leydig cells
  •  Oxyntic cells
  •  Interstitial cell
  •  Sertoli cell
Solution
(d) Sertoli cells present in the mammalian testis, nourishes the sperms. That’s why Sertoli cells are also called nurse cells. These cells also produces the inhibin hormone which halts spermatogenesis

Q6.   Sertoli cells are also called
  •  Subtentacular cells
  •  Sperm cells
  •  Interstitial cells
  •  Leyding cells
Solution
(a) Sertoli cells are also called subtentacular cells

Q7.   



  •  Option A
  •  Option B
  •  Option C
  •  Option D
Solution



Q8.   Two major entities seen in human testis TS are
  •  Sertoli cells and interstitial cells
  •  Spermatozoa and Sertoli cells
  •  Seminiferous tubules and Leydig cells
  •  Seminiferous tubules and Sertoli cells
Solution
(c) Two major entities of testes are seminiferous tubules and Leydig cells (or interstitial cells). Sertoli cells and spermatozoa are contained in seminiferous tubules only. Rest of the portion of testis is covered by connective tissue

Q9.   In testis, the immature germ cells produce sperm by …A… at puberty …B… present on the inside wall of seminiferous tubules multiply by …C… division and increase their number. Identify A, B and C from the above statement
  •  A-secondary spermatocytes, B-primary spermatocytes, C-mitosis
  •  A- primary spermatocytes, B- secondary spermatocytes, C-mitosis
  •  A-spermatogenesis, B-spermatogonia, C-mitosis
  •  A- spermatogonia, B- spermatogenesis, C-meiosis
Solution
(c) A-Spermatogenesis, B-Spermatogonia, C-Mitosis

Q10.   The maximum growth rate occurs in
  •  Stationary phase
  •  Senescence phase
  •  Lag phase
  •  Exponential phase
Solution
(d) In growth curve, exponential phase or log phase is characterized rapid growth in population, which containues till enough food is available.


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