Tag: hormones

Questions Related to hormones

Which of the following hormones is known to have calorigenic effect?

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. $T _1$ & $T _1$

  2. TCT

  3. PTH

  4. Calcitriol

Show answer
Correct Option: A
Explanation:

The calorigenic effect is a result of the increased metabolic rate and increased oxygen consumption by cells. When the metabolic rate increases, more heat is generated.T1 and T1 are hormones that have a calorigenic effect.

So, the correct option is 'T1 and T1'.

The secretion of following anterior pituitary hormones is controlled by hypothalamus

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. Thyrotropin (TSH) and cortisol

  2. Follicle stimulating hormone (FSH) and progesterone

  3. Corticotropin (ACTH), growth hormone and

    vasopressin

  4. Luteinizing hormone (LH), corticotropin (ACTH) and

    thyrotropin (TSH)

Show answer
Correct Option: D
Explanation:

Hypothalamus secretes both releasing and inhibitory hormones controlling the secretion of some anterior pituitary hormones(LH, ACTH, and TSH etc.)

Which group of hormones is natural?

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. IAA, IBA, NAA

  2. IAA, $GA _3$, ABA

  3. $2, 4$-D, Kinetin, ABA

  4. $GA _3$, Zeatin, NAA

Show answer
Correct Option: B

Hormones are called chemical signals that stimulate specific target tissues. Which is the correct location of these receptors in case of protein hormones?

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. Extracellular matrix

  2. Blood

  3. Plasma membrane

  4. Nucleus

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Correct Option: C
Explanation:

Hormones of protein nature binds to specific receptor molecules located on the plasma membrane to form the hormone receptor complex.

Hormone produced due to the effect of dietary lipids in the chyme, causes.

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. Relaxation of gall bladder

  2. Secretion of water, bicarbonate ions

  3. Inhibits gastro intestinal motility

  4. Constraction of sphincter of Oddi

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Correct Option: A

Which of these functions hormones perform in our body?

biology the endocrine system hormones coordination in human beings- chemical control endocrine system in humans

  1. Regulation of cellular activities and influencing growth

  2. Regulation of intermediary metabolism

  3. Maintenance of homoeostasis

  4. All of the above

Show answer
Correct Option: D
Explanation:

  • The functions of Hormones are : 
1. Hormones are produced by a specialized gland and are secreted directly into the bloodstream.
 2. Hormones are transported by the bloodstream from the endocrine cells to serve as ‘chemi­cal messenger’ which act on target cells or organs by regulating the rates of specific metabolic reactions. 
3. Hormones exert their effects not where they are locally produced, but on other tissues of the body. 
4. Hormones are required in very small amounts and their effect may be excitatory or inhibitory depending upon their concentration and the physiological state of the responding tissue. Hence, Regulation of cellular activities and influencing growth, Regulation of intermediary metabolism and Maintenance of homoeostasis are the functions hormones perform in our body. 
So, the correct answer is 'All of the above'.

Deficiency of hormones is caused to due to

biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

  1. Hyposecretion

  2. Hyperscretion

  3. Sweating

  4. None of the above

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Correct Option: A
Explanation:

  •  Hyposecretion- too little of any hormone in the body can be caused by a large pituitary tumour, which interferes with the pituitary gland's ability to produce hormones. Hence, Deficiency of hormones is caused to due to Hyposecretion.
So, the correct answer is 'Hyposecretion'.

Which of the following is known as chemical messenger?

biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

  1. Hormone

  2. Enzyme

  3. Colostrum

  4. None of the above

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Correct Option: A
Explanation:
A. Hormones are the chemical substances that are secreted in the body by the endocrine glands. They are known as body's chemical messengers.
B. Enzymes are colloidal macromolecules that are water soluble and partially or wholly proteinaceous in nature.
C. Colostrum is a form of milk produced from mammary glands in mammals.
So, the correct answer is 'Hormone'.

Enzymes, vitamins and hormones are common in

biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

  1. Being proteinaceous

  2. Being synthesised in the body organisms

  3. Enhancing oxidative metabolism

  4. Regulating metabolism

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Correct Option: D
Explanation:
Feedback inhibition is the process by where the end product terminates the reaction. The accumulation of the end product interferes with the enzymatic activity by changing the shape of its active site. Enzymes and hormones regulate the metabolism by feedback inhibition.
Enzymes are protein in nature and catalyzes the biological reaction without being used up in the chemical reaction. They regulate the chemical reaction by feedback inhibition. 
Hormones are the chemical messenger which activates the effector gland and regulate the metabolism by feedback inhibition.
Vitamins acts as a coenzymes which regulates the enzymatic activity and further regulate the metabolism.
So, the correct answer is option D.

Which of the statements given below are correct 
I) Hormones are non-nutrient chemical 
II) Hormones act as intracellular chemicals
III) Hormones are produced in moderate quantity
IV) Hormones may be proteins, steroids , glycoproteins or biogenic amines

biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

  1. I and II

  2. II and III

  3. III and IV

  4. I and IV

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Correct Option: A