Tag: endocrine system in humans

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

Hormones are called chemical signals that stimulate specific target tissues. Their specificity is due to the presence of signal receiving receptors only in the respective target tissues. Where are these receptors present in case of hormones of protein nature?

  1. Extra cellular matrix

  2. Blood

  3. Plasma membrane

  4. Nucleus
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

Hormones involved in maintaining $Ca^{2+}$ balance in human body includes all except

  1. cortisol

  2. aldosterone

  3. Parathormone

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

Parathormone and thyrocalcitonin are directly involved in calcium homeostasis. Aldosterone indirectly affects calcium by regulating sodium and water balance. Cortisol is a glucocorticoid and is not primarily involved in calcium balance.

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

What is correct to say about the hormone action in humans?

  1. Glucagon is secreted by $\beta$-cells of islets of Langerhans and stimulates glycogenolysis

  2. Secretion of thymosin's is stimulated with aging

  3. In females, FSH first binds with specific receptors on ovarian cell membrane

  4. FSH stimulates the secretion of estrogen and progesterone
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

Which hormone inhibit morphogenesis?

  1. ABA

  2. 2, 4-D

  3. Jasmonic acid

  4. IBA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The plant hormone abscisic acid (ABA) has been shown to promote abscission and dormancy, to inhibit cell elongation and to be involved in several hormones mediated plant responses
  • ABA inhibits seed germination.It also inhibits morphogenesis(It is the biological process that causes an organism to develop its shape).
  • So, the correct answer is 'ABA'.
Multiple choice biology chemical coordination and integration hormones coordination in human beings- chemical control endocrine system in humans

The tissues influenced by a specific hormone are referred to as its

  1. Controlled centres

  2. Substrates

  3. Target tissues

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

Hormones are chemically diverse group of molecules produced in endocrine glands. The secretions of these glands are not conducted through special ducts but are just poured into circulating blood. Specific organs also called as target tissues have special receptors on their cell surface, which binds to specific hormones. Those tissues which do not have receptors for a particular hormone will not respond to that hormone.

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

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

  1. Stimulation of organs

  2. Release of inherent capacities

  3. Proper growth

  4. Co-ordination of functions
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

Excess of hormones is caused due to

  1. Hypersecretion

  2. Hyposecretion

  3. Endosecretion

  4. Exosecretion
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.