During pregnancy:
1. All events of menstrual cycle stop and there is no menstruation
2. Events of menstrual cycle continue but there is no menstruation
3. Events of menstrual cycle contInue but there is menstruation only in the first trimester
4. All events of menstrual cycle stop and there is menstruation only in the first trimester
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the absence of fertilization, corpus luteum:
1. Stops secreting progesterone but increases the secretion of estrogen
2. Stops secreting estrogen but increases the secretion of progesterone
3. Increases the secretion of both progesterone and estrogen
4. Degenerates
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat ensures that only one sperm can fertilize the ovum?
1. Corona radiata
2. Ground substance around ovum
3. Zona pellucida
4. Acrosome
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring pregnancy the levels of thyroxin:
1. Increase several folds in maternal blood
2. Increases several folds in fetal blood
3. Decreases several folds in maternal blood
4. Decreases several folds in fetal blood
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe first movements of the fetus and the appearance of hair on the head are usually observed during:
1. 2nd month
2. 3rd month
3. 5th month
4. 6th month
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe milk produced during the initial few days of lactation, called colostrum, is essential for the new born as colostrums contains:
1. Large amount of glucose
2. Anti-infective antibodies
3. Fats
4. Various hormones
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAll of the following structures are derived from mesoderm except the ____.
1. pancreas
2. dermis of skin
3. notochord
4. heart
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySperm have several components; the function of the acrosome is to:
1. Produce base to neutralize the acidic environment of the female reproductive system
2. Propel the sperm as they swim through the fluid of the female reproductive tract
3. Release an enzyme that breaks down the membrane of the ovum
4. Metabolise the sugars provided by the semen for energy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAt what point does the secondary oocyte complete meiosis?
1. when acrosomal enzymes begin to break down the egg's jelly coat
2. when the luteinizing hormone triggers ovulation
3 after it is penetrated by a sperm cell
4. when the secondary oocyte implants in the endometrium of the uterus
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow do ovulated oocytes get into the uterus?
1. Because ovaries are within the uterus, the ovulated egg is already within the uterus.
2. Cilia within an oviduct create currents that sweep the egg toward the uterus.
3. The oocyte actively swims through the oviduct, using its flagellum.
4. Fimbriae sweep over the oviduct.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology