Tag: parturition and lactation

Questions Related to parturition and lactation

Forceful muscular contraction of uterine wall is involved in.

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

  1. Implantation

  2. Lactation

  3. Micturition

  4. Parturition

Show answer
Correct Option: D

The gestation period of elephants is about 

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

  1. 11 months

  2. 10 months

  3. 15 months

  4. 22 months

Show answer
Correct Option: D
Explanation:
For mammals, the gestation period is the time in which a foetus develops, beginning with fertilization and ending at birth. The duration of this period varies between species.
Gestation period of an elephant (Asian) is 616 days and elephant (African) is 645 days, approx 22 months.

Assertion : Predation is an interspecific interaction with a feeding strategy.

Reason :  Predation and their prey maintain fairly stable population through time and rarely one population become abundant or scarce.


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

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true

Show answer
Correct Option: A
Explanation:

Predation is an interspecific interaction with a feeding strategy i.e., one species (prey) is eaten up by another (predator). The number of predator usually depends upon the population of prey, but the later is also controlled by predators. Thus, predatory and the prey maintains fairly stable population through time and rarely one population becomes abundant or scarce.

Gestation period of $280$ days is calculated from time of
zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

  1. Last menstruation

  2. Fertilization

  3. Next menstruation

  4. Puberty

Show answer
Correct Option: A
Explanation:

The gestation period is calculated from the first day of the last menstrual period. This is used to calculate the expected date of delivery (EDD).

So the correct answer is A.

Gestation period in humans is

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

  1. $7$ months

  2. $9$ months

  3. $25$ months

  4. $8$ months

Show answer
Correct Option: B
Explanation:

Gestation period is the time period of pregnancy. It is approximately 9 months in humans. So the correct answer is B.

Gestation period is duration 
zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

  1. Between egg growth and ovulation

  2. Between fertilization and parturition

  3. Between preparation of sex cells and fertilization

  4. None of the above

Show answer
Correct Option: B
Explanation:

Development of fetus from the time of conception until birth is called as gestation period.

So the correct option is 'Between fertilization and parturition.'

Foetal ejection reflex in human female is induced by

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

  1. Release of oxytocin from pituitary

  2. Pressure exerted by amniotic fluid

  3. Differentiation of mammary glands

  4. Fully developed foetus and placenta

Show answer
Correct Option: D
Explanation:

Parturition is an induced Complex neuroendocrine mechanism. In this signals are originated from a fully developed fetus and placenta. This lead to mild uterine contractions and hence fetal ejection reflex. Then oxytocin acts on uterine muscles leading to strong uterine contractions. This further continues to stronger and stronger contractions. As a result, the baby is expelled out of the uterus with placenta through the birth canal. 

So, the correct answer is 'fully developed fetus and placenta'

Which of the following is not the reason for very high load of bilirubin in a new born?

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

  1. Excessive red blood corpuscles in the new born burst, releasing bilirubin.

  2. Insoluble bilirubin in the intestine is reabsorbed by the blood.

  3. Liver of the new born is too young to cope with the heavy load of bilirubin.

  4. Mother's milk contains a high amount of bilirubin.

Show answer
Correct Option: D
Explanation:

End of pregnancy leads to the initiation of the lactation period. This helps the mother in feeding the newborn. The milk produced during the initial few days of lactation is called colostrum which contains several antibodies and high content of bilirubin which protects the newborn baby.

So, the correct option is 'Mother's milk contains a high amount of bilirubin'.

Match the columns and find the correct options.

Column I Column II
a Parturition p Attachment of zygote to endometrium
b Gestation q Release of egg from Graafian follicle
c Ovulation r Delivery of baby from uterus
d Implantation s Duration between pregnancy and birth
e Conception t Formation of zygote by fusion of egg and sperm
u Stoppage of ovulation and menstruation
zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

  1. a-q, b-s, c-p, d-t, e-r

  2. a-s, b-r, c-p, d-t, e-q

  3. a-t, b-p, c-q, d-r, e-s

  4. a-r, b-s, c-q, d-p, e-t

Show answer
Correct Option: D
Explanation:

Parturition is also called as childbirth. It is the act of delivering baby from uterus. Gestation is a period of developing embryo from conception to birth. It is a duration considered between pregnancy and birth. Ovulation is a process of releasing of egg from the ovary or Graafian follicle. Implantation is the process in which fertilized egg or zygote adheres or attaches to the endometrium wall of the uterus. Conception is the act of conceiving  a baby. In this, zygote is formed from the fusion of egg and sperm.

Thus, the correct answer is 'a-r, b-s, c-q, d-p, e-t.'

Which is called milk ejection hormone?

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

  1. Prolactin

  2. Oxytocin

  3. Vassopressin

  4. Luteinizing hormone

Show answer
Correct Option: B
Explanation:

The release of the hormone oxytocin from maternal pituitary which leads to the milk ejection.  Oxytocin stimulates the muscle contraction surrounding the breast to squeeze out the milk. 

so, the correct option is 'Oxytocin'.