NEET 2020: We are providing here some important questions. For upcoming exam NEET 2020 These questions are based on the topic of BIOLOGY section HUMAN REPRODUCTION (PART TWO) which are considered important for the upcoming test. All questions are provided with correct answers.
- Human reproduction (part two)
More details for HUMAN REPRODUCTION (Part One)
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Q.1)Which of the following can be termed as milk ejecting hormone?
(a)Prolactin
(b)Oxytocin
(c)Progesterone
(d)Oestrogen
Amswer: Ocyatocin
Explanation: Oxytocin is milk ejecting because it stimulates contraction of smooth muscles of mammary glands
Q.2) Which of the following best represents the normal path of a sperm cell as makes its way from the point of entry into the female’s reproductive tract to the place where fertilisation typically occurs?
(a)Cervix, vagina, ovary, oviduct
(b)Vagina, cervix, uterus, oviduct
(c) Uterus, cervix, vagina, oviduct
(d) Vagina, uterus, cervix, oviduct
Answer: (b)Vagina, cervix, uterus, oviduct
Explanation: A sperm is ejected by the male into the vagina. From the vagina, the sperm move through the cervix into the uterus and finally the oviduct where fertilisation occurs.
Q.3) If both ovaries are removed form pregnant Human female in first trimester of pregnancy then it will lead to?
(a) Irregular ovulation no fixed time interval
(b) Menarche
(c) Abortion
(d) Normal development
Answer: (c)Abortion
Q.4) A temporary endocrine gland in the human body is?
(a) corpus allatum
(b) Corpus leteum
(c) Corpus cardiacum
(d) Pineal gland
Answer: (b) Corpus leteum
Explanation: Corpus leteum is the temporary endocrine structure formed in the ovary after ovulation. It is responsible for the release for the hormone like progesterone , oestrogen etc.
Q.5) The amnion of mammalian embryo is derived form?
(a) Endoderm and Mesoderm
(b) Mesoderm and Trophoblast
(c) Ectoderm and Mesoderm
(d) Ectoderm and Endoderm
Answer:(c) Ectoderm and Mesoderm
Q.6) Several hormone like hCG, hPL, estrogen, progesterone are produced by?
(a) Pituitary
(b) Fallopain tube
(c) Ovary
(d) Placenta
Answer:(d) Placenta
Explanation: Hormones secreted by placenta are hCG, hPL estrogen and progesterone
Q.6) which centriole of spermatozoa is required for first cleavage?
(a) Distal Centriole
(b) Ring centriole
(c) Proximal centriole
(d) posterior centriole
Answer:(c) Proximal centriole
Explanation: proximal centriole and nucleus of sperm enter the secondary Oocyte during fertilization
Q.7) Androgen binding protein which helps in Concentrating testosterone in the seminiferous tubule, is secreted by?
(a) Interstitial cells
(b) Sustentacular cells
(c) Spermatogonial cells
(d) Cells of Leydig
Answer:(b) Sustentacular cells
Explanation: sertoli cells are also known as nurse cells or sustentacular cells. They secret inhibin.
Q.8) Home use kits for determing a woman's fertile period depend on the detection of one hormone in the urine. The hormone is?
(a) hCG
(b) Estradiol
(c) LH
(d) Progesterone
Answer:(c) LH
Explanation: LH surge occurs during fertile period. LH induce ovulation.
Q.9) Which of the following is not a correct statement about umbilical cord?
(a) It produces several hormones like hPL, estrogen and progesterone
(b) It helps in the transport of substances to and from the embryo
(c) It has 100% foetal blood
(d) It connects the placenta to the embryo
Answer:(a) It produces several hormones like hPL, estrogen and progesterone
Explanation:Umbilical cord is not an endocrine structure but placenta functions as temporary endocrine gland
Q.10) The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed?
(a) After one month of pregnancy
(b) By the end of first trimester
(c) By the end of the second month of pregnancy
(d) During fifth month
Answer:(a) After one month of pregnancy
Explanation:The first heart sounds can be heard after four weeks of embryonic development
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