Tag: testes and ovary

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Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Breast development during pregnancy is induced by

  1. Thyroxin

  2. Progesterone and estrogen

  3. Relaxin

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Estrogen promotes the development of the ductal system, while progesterone promotes the development of the lobulo-alveolar system in the breasts during pregnancy.

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Hormone prolactin was discovered by

  1. Riddle

  2. Hisaw

  3. Leonard

  4. Hisaw and Leonard
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Prolactin was discovered in non-human animals around 1930 by Oscar Riddle. It promotes milk production in the female. It is also known as a lactogenic hormone. It is produced by the pituitary gland.

So, the correct answer is option A.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

In male, the retard growth of the secondary sexual characters is due to the deficiency of which one of the following hormones?

  1. Progesteron

  2. Androsterone

  3. Cortin

  4. Thyroxin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Androgens include the male hormones testosterone and androsterone and promote development of male sex characteristics. The androgens promote the secondary sex characteristics of muscle growth, lowered voice range, the Adam's apple, and increased body hair.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

The function of glucagon hormone is

  1. To increase glycogenesis

  2. To decrease blood sugar level

  3. To release glucose from liver cells and glycogenolysis promotion

  4. To increase the absorption of glucose and fatty acids through cell
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glucagon's role in the body is to prevent blood glucose levels dropping too low. It acts on the liver and stimulates the conversion of stored glycogen (stored in the liver) to glucose, which can be released into the bloodstream. This process is called as glycogenolysis.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

When mammary glands of male develop similar to that of female, then this condition is known as:

  1. Gonochorism

  2. Gynaecomastia

  3. Feminism

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gynaecomastia is enlargement of the male breast tissue. Oestrogen stimulates breast tissue growth, while androgens inhibit it. The important factor is the ratio of active androgens to oestrogens. The ratio can be altered as a result of reduced testosterone production/action or enhanced oestrogen production/action or both. 

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

The name of hormone secreted by the pituitary, which facilitates growth of ovarian follicle is

  1. Progesterone

  2. LH

  3. FSH

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

Follicle-stimulating hormone (FSH) is synthesized and secreted under the influence of GnRH on the anterior pituitary. It regulates the development, growth, maturation of ovarian follicle, pubertal maturation and reproductive processes of the body. FSH and luteinizing hormone (LH) act synergistically in reproduction. Under the influence of FSH ovary secretes estrogen. Thus the correct answer is option C.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

In males, the essential hormone for secondary sexual characteristics is

  1. Testosterone

  2. Progesterone

  3. Estrogen

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

The major sex hormone in men is testosterone, which is produced mainly in the testes. They are crucial for male sexual and reproductive function. They are also responsible for the development of secondary sexual characteristics in men, including facial and body hair growth, and bone and muscle development. 

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Pregnancy hormone is

  1. Oestrogen

  2. Androgen

  3. Progesterone

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

Progesterone is a natural female hormone. It is called as the pregnancy hormone, it is essential before and during pregnancy. After ovulation occurs, the ovaries start to produce progesterone needed by the uterus. Progesterone causes the uterine lining or endometrium to thicken. This helps prepare a supportive environment in the uterus for a fertilized egg. After 8 to 10 weeks of pregnancy, the placenta takes over progesterone production from the ovaries and substantially increases progesterone production.

Therefore, the correct answer is option C.

Multiple choice zoology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Which of the following hormones is responsible for hoarseness in voice, beard, moustaches etc. in males?

  1. Gonadotropic hormone

  2. Adrenaline

  3. Thyroid

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The secretion of pituitary gonadotrophic hormones is stimulated by gonadotropin hormone-releasing hormone (GnRH) from the hypothalamus and modulated by testicular hormones. At the onset of puberty, the pituitary gland secretes GnRH, or gonadotropin-releasing hormone. In response, the hypothalamus release follicle stimulating hormone (FSH) and luteinizing hormone (LH) into the male system. LH enters the testes, stimulating the Leydig cells to release testosterone. Testosterone hormone is responsible for the secondary sexual characteristics like deepening of the voice, the growth of facial, axillary, and pubic hair, and the beginnings of the sex drive.

Multiple choice biology control and coordination in living organisms control of blood glucose endocrine system and hormone hormones in human reproduction testes and ovary parts of the brain kidney

Gorilla like man with large head and hands and protruding jaws, is produced due to

  1. Over secretion of thyroxin

  2. Over secretion of growth hormone since maturity

  3. Excess of vitamin 'C' in diet

  4. Excess secretion of TSH
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Acromegaly is a hormonal disorder that develops when pituitary gland produces too much growth hormone during adulthood. When this happens, bones increase in size, including those of hands, feet and face. Acromegaly usually affects middle-aged adults.