Tag: fertilization and post fertilization in humans

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Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

At the time of birth, a baby girl has thousands of immature eggs.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Unlike spermatogenesis, oogenesis starts in embryonic life with the formation of oogania ( gamete mother cells ).
  • Oogania starts dividing and enter into a prophase-I stage of the meiosis. They get arrested at this stage and they are called as primary oocytes now. 
  • These oocytes are basically immature eggs and they are present in thousands within each ovary of a baby.
So, the correct option is 'True'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Mother's milk is preferred to cow's milk because it contains

  1. More fats and more lipids

  2. Less lopids and more fats

  3. More lipids and less fats

  4. Less fats and less lipids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Whole cow's milk also contains too much protein, sodium, potassium, phosphorus and chloride which may put a strain on an infant's immature kidneys. In addition, the proteins, fats and calcium in whole cow's milk are more difficult for an infant to digest and absorb than the ones in breast milk. So, the correct option is "D" (Less fats and less lipids).

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Column I contains terms and Column II contains definitions. Match them correctly and choose the right answer.

Column I Column II
A Parturition 1. Attachment of zygote to endometrium
B. Gestation 2. Release of egg from Graafian follicle
C. Ovulation 3. Delivery of baby from uterus
D. Implantation 4. Duration between pregnancy and birth
E. Conception 5. Formation of zygote by fusion of the egg and sperm
6. Stoppage of ovulation and menstruation

  1. A - 2, B - 4, C - 1, D - 5, E - 3

  2. A - 4, B - 3, C - 1, D - 5, E - 2

  3. A - 5, B - 1, C - 2, D - 3, E - 4

  4. A - 3, B - 4, C - 2, D - 1, E - 5
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The duration of pregnancy from conception till birth is known as gestation. It occurs for a duration of 40 weeks. The release of eggs from the ovaries (or the mature graafian follicle) is known as ovulation. Implantation is the process in which the embryo in the blastocyst stage is implanted in the uterus. When the egg fuss with the sperm resulting in the formation of zygote it is known as conception. Parturition is the act of childbirth in which the baby is delivered from the uterus. So, the correct option is 'A - 3, B - 4, C - 2, D - 1, E - 5'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The function of oxytocin is to help in

  1. child birth

  2. growth

  3. lactation

  4. gametogenesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxytocin i a hormone released by the posterior pituitary that helps the muscles of the uterus to contract during parturition (child birth). It also stimulates the release of prostaglandins that help cause further contraction. So, the correct option is 'child birth'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Estrogen progesterone ratio increases during end of the 3rd trimester. This is responsible for increasing

  1. Lactation

  2. Uterine contractions

  3. Oxytocin secretion

  4. Dilation of uterus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The increased levels of oxytocin at the time of parturition are responsible for vigorous uterine contractions and the dilation of the uterus. 
  • The estrogen-progesterone ratio increases during the end of the 3rd trimester which results in the increased ability of the mammary glands for lactation.

So, the correct answer is 'lactation'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Increase in concentration of which hormone determines the time of child birth?

  1. hCG

  2. hPL

  3. Oxytocin

  4. Progesterone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxytocin is the hormone that stimulates powerful uterine contractions, and its concentration increases significantly to determine the onset and progression of labor (childbirth).

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The mother gives birth to the child when the development of the _____ is complete.

  1. Utrus

  2. Zygote

  3. Foetus

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Birth occurs when foetal development is complete, typically around 38-40 weeks of gestation. The zygote is the initial single-cell stage formed at fertilization, not the developed stage ready for birth. The uterus is the organ, not the developing organism. At birth, the foetus has developed all major organ systems and is ready to survive outside the womb. Thus, completion of foetal development is the prerequisite for birth.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The act of expelling the full term foetus from the uterus is termed as

  1. Gestation

  2. Implantation

  3. Parturition

  4. Capacitation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of delivery of foetus is called as parturition. Parturition is the act of expelling the full-term foetus from the mother's uterus at the end of gestation. In this process fully developed foetus produces foetal ejection reflex which stimulates pituitary to release oxytocin hormone. This hormone causes vigorous uterine contraction that leads to the delivery of feotus. This process is also known as the delivery of the foetus when the pregnancy period gets over. The importance of parturition is that the event results in the foetus to come out of the womb. The process is accompanied with the onset of lactation.

Thus, the correct answer is option C. 

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Gestation period of Salamandra atra is 

  1. 200 days

  2. 540 days

  3. 36 months

  4. 440 days
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Salmonella atra is an amphibian having one of the longest gestation periods among animals existing on this earth. They have a gestation period between 36-48 weeks.

They are unique in the sense that it has an ovo-viviparous method of reproduction by which it gives birth on land to fully metamorphosed offspring causing such a long gestation period.
So, the correct option is '36 months'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Which grouping has gestation period in decreasing order?

  1. Cow, Horse, Goat, Monkey and Swine/ Pig

  2. Horse, Cow, Goat, Monkey and Swine

  3. Money, Cow, Horse, Goat and Swine

  4. Monkey, Horse, Goat, Cow and Swine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The horse has a gestation period of around 342 days whereas it is around 289 days for the cow.

Goat has a gestation period of 165 days and for Monkey, it is 155 to 160 days. Pig has the least gestation period of around 116 days.
So, the correct option is  'Horse, Cow, Goat, Monkey, and Swine'