Tag: biology

Questions Related to biology

Which of the following is a gonadotropic hormone? 

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

  1. Collip's hormone

  2. Prolactin

  3. Oxytocin

  4. Luteinizing hormone

Show answer
Correct Option: D
Explanation:

Luteinizing hormone (LH) stimulates the production of sex hormones by gonads. Since LH acts on gonads, it is known as gonadotropic hormones.  

Oxytocin stimulates strong uterine muscle contraction during childbirth and is known as the birth hormone.
Prolactin targets mammary gland to stimulate breast development and milk production after baby birth.
Parathormone is also called as Collip's hormone and serves to regulate blood calcium level. 
So, the correct answer is option D.

ADH responsible for reabsorption of water and reduction of urine secretion is released by 

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

  1. Posterior pituitary gland

  2. Juxtaglomerular apparatus

  3. Anterior pituitary gland

  4. Hypothalamus

Show answer
Correct Option: A
Explanation:

ADH secretion is regulated by plasma osmolality. If osmolality increases it stimulates secretion of ADH which act at the collecting duct of nephron where it causes the reabsorption of only water and produces the concentrated urine.

So, the correct answer is 'Posterior pituitary gland'.

Vasopressin influences 

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

  1. Electrolyte efflux

  2. Nerve excitability

  3. Water reabsorption

  4. All of the above

Show answer
Correct Option: C
Explanation:

Vasopressin, also known as antidiuretic hormone (ADH), is a neurohypophysial hormone which has two primary functions- to retain water in the body and to constrict the blood vessels. Vasopressin regulates the body's retention of water by increasing water reabsorption in the collecting ducts of the kidney nephron.

Mammalian prolactin is secreted by 

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

  1. Adenohypophysis

  2. Neurohypophysis

  3. Adrenal cortex

  4. Adrenal medulla

Show answer
Correct Option: A
Explanation:

Prolactin (PRL), also known as luteotropic hormone or luteotropin, is a protein, that in humans is best known for its role in enabling female mammals to produce milk. Prolactin is a single-chain protein hormone. It is secreted by the lactotrophs in the anterior pituitary (adenohypophysis).

The formation of egg and sperm is affected by 

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

  1. LH

  2. MSH

  3. TSH

  4. FSH

Show answer
Correct Option: D
Explanation:

In women, FSH hormone stimulates the growth of ovarian follicles in the ovary, before the release of an egg from one follicle at ovulation. It also increases oestradiol production. 

In men, follicle stimulating hormone acts on the Sertoli cells of the testes to stimulate sperm production (spermatogenesis).

Acromegaly is a disease caused by 

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

  1. Over secretion of growth hormone in childhood.

  2. Over secretion of growth hormone in adulthood.

  3. Under secretion of growth hormone in adulthood.

  4. Deficiency of calcium and phosphorous in the diet.

Show answer
Correct Option: B
Explanation:

Acromegaly is the abnormal growth of the hands, feet, and face. It is caused when there is oversecretion of growth hormone (GH) in adulthood. Similarly, oversecretion of growth hormone in childhood causes Gigantism. 

It is usually caused by a non-cancerous tumor in the pituitary gland.
Its symptoms include large hands and feet, thick lips, coarse facial features, a jutting forehead and jaw, and widely spaced teeth. Thus, the correct answer is option B.

"4s gland" is 

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

  1. Pancreas

  2. Liver

  3. Thyroid

  4. Adrenal

Show answer
Correct Option: D
Explanation:

The adrenal gland is known as 4S gland. 4S stands for the source of energy, sugar metabolism, salt retention and sex hormones. 

The adrenal glands, located at the top of each kidney, produce hormones that help the body control blood sugar, burn protein, and fat, react to stressors like a major illness or injury and regulate blood pressure. Two of the most important adrenal hormones are cortisol and aldosterone.

Which of the following hormones fall under the group amino acid derivatives?

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Thyroid hormones

  2. Testosterone

  3. Glucagon

  4. Epinephrine

Show answer
Correct Option: A,D
Explanation:

A.Thyroid hormones derived from the amino acid tyrosine.

B. testosterone is derived from cholesterol 

C.Glucagon is derived from proglucagon

D. Epinephrine,derived from the amino acid tyrosine, 

So, the correct answer is 'Epinephrine' and Thyroid hormone'.

Which of the following is very accurate in case of hormonal control and coordination in human body?

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Response is slow and wide spread

  2. Transmission of impulse is very quick

  3. Information passes through blood and lymph

  4. Both A and C

Show answer
Correct Option: D
Explanation:

Hormonal control and coordination are carried out via transmission through blood and lymph as it serves as a media for carrying and circulating hormones. However, the transmission may not be very quick. while the response is slow and widespread.

So, the correct option is 'Both A and C'.

The activities of the gastrointestinal tract are under the control of 

biology coordination and response control of blood glucose endocrine system and hormone hormones in human reproduction

  1. Nervous system

  2. Hormones

  3. Both A and B

  4. None of these

Show answer
Correct Option: C
Explanation:

The activities of the gastrointestinal tract are under the control of the nervous system and hormones. The sight, smell and/or the presence of food in the oral cavity can stimulate the secretion of saliva. Similarly, gastric and intestinal secretions are also stimulated by neural signals. The muscular activities of different parts of the alimentary canal can also be moderated by neural mechanisms (both local and through CNS). Hormonal control of the secretion of digestive juices is carried out by local hormones produced by the gastric and intestinal mucosa.

So, the correct option is 'Both'.