Tag: hormones of placenta

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Questions Related to hormones of placenta

Multiple choice biology control and coordination in living organisms hormones of placenta coordination in human beings- chemical control endocrine system in humans

Which one of the following is temporary endocrine gland?

  1. Pineal

  2. Pancreas

  3. Placenta

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

The placenta is an endocrine gland, that is only present during pregnancy. It produces hormones including human chorionic gonadotropin (hCG), progesterone, estrogen, and human placental lactogen (hPL).

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans
Pick up the hormone which is not secreted by human placenta.

  1. hCG

  2. hPL

  3. Prolactin

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

Prolactin is a hormone secreted in mammals (lactotrophs), usually females and stimulates the mammary gland to produce milk. This hormone is also called luteotropin or luteotropic hormone. The major source of prolactin is the anterior pituitary regulated by the hypothalamus, however, several other tissues synthesize and secrete this hormone. All the other hormones in the options such as hCG, hPL, and estrogen are secreted by the placenta.

Thus, the correct answer is 'Prolactin'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Placenta produces certain hormones.

  1. True

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

Placenta acts as a barrier between the mother and foetus and is a temporary association between the foetal and maternal tissues. It acts as an endocrine gland and secretes hormones such as human Chorionic Gonadotropin (hCG), chorionic corticotropin, oestrogens and progesterone.

Hence, the statement given in the question is correct. So, the correct answer is 'True'

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Hormone, human chorionic gonadotropin, is secreted by

  1. Placenta

  2. Ovary

  3. Anterior pituitary gland

  4. Posterior pituitary gland
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The placenta is a cushion like tissue which supports the embryo and facilitates the supply of oxygen and nutrients to the embryo and also the removal of carbon dioxide and excretory waste materials produced by the embryo. It also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin, human placental lactogen, estrogens, progesterone, and relaxin etc.

So, the correct option is 'Placenta'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Find the correct options.
(a) Testosterone influences male secondary sexual characters.
(b) Gestation period in Rabbit is about 276 days.
(c) The bulbourethral gland secretes a vaginal lubricant.
(d) Placenta secretes estrogen.

  1. b, c

  2. c, d

  3. a, d

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

A) Testosterone is the male hormone which helps in the formation of sperms and male secondary sexual characters. 

B) The gestation period of a rabbit is about 27 to 30 days.
C) Bulbourethral gland helps in lubrication of the penis.
 D) Placenta secretes many hormones like human placental lactogen, human chorionic gonadotropin,  estrogens, progesterone, etc.
So the correct option is 'a,d'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Identify the placental hormone

  1. Insulin

  2. Vasopressin

  3. Somatotropic hormone

  4. Human chorionic gonadotropin (hCG)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Human chorionic hormone (hCG) is placental hormone concerning with maintenance of pregnancy. 

Insulin is a pancreatic hormone while vasopressin and somatotropic hormone (growth hormone) are secreted from pituitary gland.
So, the correct option is 'Human chorionic hormone'.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Placenta produces

  1. GH

  2. ACTH

  3. Progesterone

  4. Gastrin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • GH and ACTH are secreted by the cells of the anterior pituitary.
  • Gastrin hormone is produced by the parietal cells of the stomach and aids in gastric mobility.
  • The growing placenta produces progesterone prevents the shedding of the uterine lining since this would result in pregnancy loss. It also suppresses the ability of the muscular layer of the uterine wall to contract, which is important in preventing labour from occurring before the end of pregnancy.
  • So, the correct option is 'Progesterone'.
Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Chorionic gonadotropin is secreted by

  1. Pituitary

  2. Ovary

  3. Placenta

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

During implantation of the zygote in the uterus, the chorionic villi and the uterine endometrium become interdigitated with each other and form the placenta. The placenta supplies oxygen/nutrients to the developing fetus and also removes carbon dioxide and waste products from the fetus. Placenta also acts as an endocrine tissue and secretes several hormones like Human Chorionic Gonadotropin (hCG), human placental lactogen (hPL), estrogen, progesterone etc.

So the correct answer is C.

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Human chorionic gonadotropin is secreted by 

  1. Chorion

  2. Amnion

  3. Corpus luteum

  4. Placenta

  5. Ovaries
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The placenta is an organ, that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination etc. hCG is human chorionic gonadotropin hormone, that can be found in maternal blood and urine shortly after implantation has occured. hCG is present only during pregnancy as it is secreted by the placenta. The syncytical layer of chorionic villi of placenta secretes hCG.
Thus, the correct answer is option (D).

Multiple choice biology chemical coordination and integration hormones of placenta coordination in human beings- chemical control endocrine system in humans

Chorionic gonadotropic hormone is secreted by 

  1. Ovary

  2. Pituitary

  3. Uterus

  4. Placenta
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • The hormone human chorionic gonadotropin (hCG) is produced during pregnancy.
  • It is made by cells formed in the placenta, which nourishes the egg after it has been fertilized and becomes attached to the uterine wall.
  • Its levels can first be detected by a blood test about 11 days after conception and about 12-14 days after conception by a urine test.
So, the correct option is 'Placenta'.