Tag: chemical coordination and integration

Questions Related to chemical coordination and integration

The effect of different hormones on the body can be best said to bring about

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

  1. Stimulation of organs

  2. Release of inherent capacities

  3. Proper growth

  4. Co-ordination of functions

Show answer
Correct Option: D
Explanation:

Hormones are our body's chemical messengers. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect many different processes, including- growth and development, metabolism that derives energy from the foods we eat, sexual function, reproduction, mood. All of these is achieved by coordination of functions. Thus, answer is- 'co-ordination of functions'.

Excess of hormones is caused due to

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

  1. Hypersecretion

  2. Hyposecretion

  3. Endosecretion

  4. Exosecretion

Show answer
Correct Option: A
Explanation:

  • Hypersecretion means excessive production of a bodily secretion. 
  • Hypersecretion - too much of any hormone in the body is caused by a secretory pituitary tumour. 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, Excess of hormones is caused due to Hypersecretion.
So, the correct answer is 'Hypersecretion'.

Term 'hormone' was coined by

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

  1. W. M. Bayliss

  2. E. H. Schally

  3. E. H. Starling

  4. G. W. Harris

Show answer
Correct Option: C
Explanation:

The word "hormone" was coined by the English physiologist Ernest H. Starling in connection with the discovery of secretin, the first hormone, in 1902.

Which of the following best describes hormones?

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

  1. Hormones are relatively unstable and work only in the area adjacent to the gland that produced them.

  2. Hormones are stable, long-lasting chemicals released from gland.

  3. Hormones are chemical messengers that are released into the environment.

  4. All hormones are lipid-soluble.

Show answer
Correct Option: B
Explanation:

A hormone is a regulatory chemical that is secreted into the blood by an endocrine gland or an organ of the body exhibiting an endocrine function. The blood carries the hormone to every cell in the body, but only the target cells for a given hormone can respond to it. Thus Hormones are stable, long lasting chemicals released from glands.

Which of the following is not necessarily a property of all hormones?

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

  1. Information carrying

  2. Secreted in low amounts

  3. Short half-life

  4. Protein in nature

Show answer
Correct Option: D
Explanation:

All hormones in the human body can be divided into lipid-derived, amino acid-derived, and peptide hormones. They are biochemical messengers, secreted in very low amounts with considerably small half - life.

I am secretions of endocrine glands. Chemically I maybe steroids, proteins or amino acid derivatives. I am transported by blood to the reaction site. I may accelerate or inhibit specific activity. My action may be slow or quick
Who am I?

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

  1. Hormone

  2. Digestive juice

  3. Enzyme

  4. Water

Show answer
Correct Option: A
Explanation:

Hormone is a regulatory substance produced in an organism by glands and transported in tissue fluids such as blood to stimulate specific cells or tissues into action.

Hormones may be

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

  1. Steriods

  2. Peptides

  3. Amino acid derivatives

  4. All of the above

Show answer
Correct Option: D
Explanation:
Different hormones have different chemical nature depending on the molecules they are made up of.
A. Steroid hormones are synthesised from cholesterol. They are in the form of lipids. For example, aldosterone, cortisol, progesterone etc.
B. Peptide hormones are the proteinaceous hormones. For example, insulin, glucagon, relaxin etc.
C. Amino acid derivatives are the hormones that contain amino acids. For example, thyroxine secreted from thyroid gland contains tyrosine amino acid.
Hence, all the options are correct.
So, the correct answer is 'All of the above'.

Hypersecretion of GH from pituitary in the adult causes a
disease called

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

  1. Gigantism

  2. Acromegaly

  3. Cushing's disease

  4. Addison's disease

Show answer
Correct Option: B
Explanation:

Hypersecretion of growth hormones or catastrophic hormone during adulthood causes acromegaly. Acromegaly patient has a gorilla like appearance with huge hands and legs.

An organ where a hormone shows its effect is called

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

  1. Effector

  2. Target

  3. Initiator

  4. Terminator

Show answer
Correct Option: B
Explanation:
Hormones are the chemicals or signalling molecules secreted from endocrine glands in the blood from where they are carried to their target organs. The target organs are the organs where these hormones act and show their effect. Target organs have receptors for specific hormones where the hormones bind and cause changes in the functioning and regulation of that particular target organ. On the other hand, the organs which respond to any nerve stimulus are called effector organs.
So, the correct answer is 'Target'.

Hormone term was coined in 1905 by

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

  1. E.H. Starling

  2. G.W. Harris

  3. E.H. Schally

  4. None of the above

Show answer
Correct Option: A
Explanation:

  •  E.H. Starling in 1905 discovered a signalling molecule or chemical secretin, from pancreatic secretions and named this signalling molecule as hormone.
  •  G.W. Harris is known as the father of neuroendocrinology. He worked on the neural control of endocrine system
So, the correct answer is 'E.H. Starling'.