Tag: biology

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Questions Related to biology

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

Growth hormone is produced in

  1. Adrenals

  2. Thyroid

  3. Pituitary

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

Growth hormone is released into the bloodstream from the anterior pituitary gland. Growth hormone release is caused by another hormone (growth hormone-releasing hormone), which is released from the hypothalamus and it causes the pituitary gland to release the growth hormone.

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

Vasopressin is related with

  1. Conservation of water

  2. Quick digestion

  3. Dilution of urine

  4. Slow heart beat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vasopressin/antidiuretic hormone (ADH) is secreted by posterior pituitary gland and targets nephron tubules to increase water reabsorption and thereby decreasing water content in urine while increasing that of blood. Increased water concentration in blood raises blood volume and blood pressure. It makes the urine concentrated. Thus, the correct answer is option A.

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 follicle stimulating hormone is secreted from

  1. Posterior lobe of pituitary gland

  2. Reproductive gland

  3. Thyroid gland

  4. Anterior lobe of pituitary gland
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Follicle-stimulating hormone (FSH) is a glycoprotein and gonadotropin secreted by the anterior pituitary in response to gonadotropin-releasing hormone (GnRH) released by the hypothalamus. It helps in the development of follicles in female and triggers Sertoli cells to initiate spermatogenesis in the male.

So, the correct answer is option D.

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 hyposecretion of ADH causes

  1. Diabetes melitus

  2. Diabetes insipidus

  3. Goitre

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

Abnormal secretion of hormones brings about physical changes in the body. The hyposecretion of  ADH showcases as diabetes insipidus with increased urine output and excessive thirst. Thus, the correct answer is option B.

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 hormones FSH and LH are together called as

  1. Emergency hormone

  2. Neurohormone

  3. Gonadotropic hormone

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

The hormones FSH and LH are together called as gonadotropin hormones. They are called the gonadotropins as they stimulate gonadal activity. The anterior pituitary (pars distalis) releases following gonadotrophic hormones:

  1. Follicle stimulating hormone (FSH): In males, FSH regulates spermatogenesis (formation of sperms) and in females, FSH stimulates growth and development of ovarian follicles and secretion of estrogen hormone.
  2. Luteinizing hormone (LH): In males, LH is also called ICSH (interstitial cell-stimulating hormone) which stimulates testes to synthesize and secrete androgens (testosterone). It activates Leydig cells of the testes to secrete testosterone. In females, LH stimulates the ovulation of the fully matured Graafian follicles and also maintains the corpus luteum, formed from the remnants of Graafian follicles after ovulation. The corpus luteum secretes progesterone and some estrogen under the action of LH.
So, the correct answer is 'Gonadotropic hormone'.

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

Gonadotropic hormone is produced by

  1. Interstitial cells of testis

  2. Adrenal cortex

  3. Adenohypophysis

  4. Posterior part of thyroid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The anterior pituitary (also called the adenohypophysis or pars anterior) contains five types of endocrine cell, and they are defined by the hormones they secrete: somatotropes (GH); prolactins (PRL); gonadotropes (LH and FSH); corticotropes (ACTH) and thyrotropes (TSH). Hormones secreted by the anterior pituitary are trophic hormones and tropic hormones. 

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

Which hormone is concerned with the concentration of urine?

  1. Oxytocin

  2. Vasopressin

  3. Prolactin

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

Vasopressin also known as ADH (Anti-Diuretic Hormone) is made up by hypothalamus and it is transported to posterior pituitary gland which secretes the hormone into the blood stream. Its functions:

1. It helps to control blood pressure by acting on the kidneys and the blood vessels. 
2. However, Its most important role is to conserve the fluid volume of our body by reducing the amount of water (making it more concentrated) which passed out in the urine. Hence option B is correct.

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

MSH is secreted in man by which part of pituitary?

  1. Anterior Pituitary

  2. Dorsal lobe of pituitary

  3. Posterior lobe of pituitary

  4. Intermediate lobe of pituitary
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In vertebrates, the pituitary gland is an endocrine gland which is about the size of a pea. The intermediate lobe synthesizes and secretes melanocyte-stimulating hormone (MSH). It stimulates the production and release of melanin by melanocytes in skin and hair. Thus, the correct answer is option D.

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

LH and FSH are collectively called as

  1. Oxytocin

  2. Somatotropin

  3. Luteotrophin

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

LH and FSH are collectively called as gonadotropin. They are called the gonadotropins as they stimulate gonadal activity. The anterior pituitary (pars distalis) releases following gonadotrophic hormones:

  1. Follicle stimulating hormone (FSH) : In males, FSH regulates spermatogenesis (formation of sperms) and in females, FSH stimulates growth and development of ovarian follicles and secretion of estrogen hormone.
  2. Luteinizing hormone (LH) : In males, LH is also called ICSH (interstitial cell stimulating hormone) which stimulates testes to synthesise and secrete androgens (testosterone). It activates Leydig cells of the testes to secrete testosterone. In females, LH stimulates the ovulation of the fully matured Graafian follicles and also maintains the corpus luteum, formed from the remnants of Graafian follicles after ovulation. The corpus luteum secretes progesterone and some estrogen under the action of LH.