Tag: chemical coordination and integration

Questions Related to chemical coordination and integration

Given is an incomplete table on hormones, their source glands and one major effect of each human body. Identify the option representing correct grouping of hormone its gland and effect.

Gland Secretion Effect on body
A Oestrogen Maintenance of secondary sexual characters
Alpha cells of Islets of Langerhans B Raises blood sugar level
Anterior pituitary C Over secretion leads to gigantism


  1. A- ovary, B-glucagon, C-growth hormone

  2. A-placenta, B-insulin, C-vasopressin

  3. A-ovary, B-insulin, C-calcitonin

  4. A-placenta, B-glucagon, C-calcitonin


Correct Option: A

Which of the following hormone functions through generating second messengers ?

  1. lodothyroglobulin

  2. Estrogen

  3. Adrenaline

  4. Estradiole


Correct Option: A

How many of the following hormones have nuclear receptors?
Thyroxine, Catecholamines, Cortisol, Cholecystokinin, Growth hormone.

  1. $2$

  2. $3$

  3. $4$

  4. $5$


Correct Option: A

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


Correct Option: A

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

  1. cortisol

  2. aldosterone

  3. Parathormone

  4. thyrocalcitonin


Correct Option: A

I. Insulin 
II. Epinephrine 
III.Oestradiol
IV.Norepinephrine
V.Testosterone
VI.Glucagon
Which of the above hormones are amino acid derivatives?

  1. I and II

  2. III and IV

  3. V and VI

  4. II and IV


Correct Option: A

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


Correct Option: A

Which hormone inhibit morphogenesis?

  1. ABA

  2. 2, 4-D

  3. Jasmonic acid

  4. IBA


Correct Option: A
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'.

Acetylcholine can be hydrolysed into 

  1. Acetic acid

  2. Choline

  3. Dopamine

  4. Both A and B


Correct Option: D

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


Correct Option: C
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.