Tag: endocrine system and hormone

Questions Related to endocrine system and hormone

Biogenic amines are synthesized from

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Tryptophan

  2. Tyrosine

  3. Glutamic acid

  4. Phenylalanine

Show answer
Correct Option: B
Explanation:
Amines are the compounds that contain an amine group. They are formed as a result of deamination, a process in which amino group is removed from the amino acid. Some hormones like epinephrine and norepinephrine are amines. They are derived from amino acid tyrosine. 
So, the correct answer is 'Tyrosine'.

Which of the following hormones is a derivative of fatty acids?

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Gastrin

  2. Thymosin

  3. Estrogen

  4. Prostaglandins

Show answer
Correct Option: D
Explanation:
A. Gastrin hormone is a derivate of protein.
B. Thymosin hormone is a derivate of peptide.
C. Estrogen hormone is a derivate of steroid.
D. Prostaglandins hormone is a derivate of fatty acids.
So, the correct answer is 'Prostaglandins'.

Which one of the following is a peptide hormone:-

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Glucagon

  2. Testosterone

  3. Thyroxin

  4. Adrenaline

Show answer
Correct Option: A
Explanation:
Glucagon is a single chain peptide of 29 amino acids, synthesised by the α-cells in the islets of Langerhans of the pancreas.

So, the correct answer is 'Glucagon'.

Supra optic nuclei (in hypothalamus) secrete the hormone.

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. ADH

  2. Oxytocin

  3. Pitocin

  4. Both (2) and (3)

Show answer
Correct Option: A

Steroid hormones easilu pass through the plasma membrane by simple diffusion because they _______________.

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Are water soluble

  2. Contain carbon and hydrogen

  3. Enter through pores

  4. Are lipid soluble

Show answer
Correct Option: D

Choose the correct answer from the alternatives given.
Peptide hormones:

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. are received by a receptor located in the plasma membrane

  2. are received by a receptor located in the cytoplasm

  3. bring about the transcription of DNA

  4. both (a) and (c)

Show answer
Correct Option: A
Explanation:

Hormones produce their effects on target tissues by binding to specific proteins called hormone receptors located in the target tissue only. Hormone receptors present on the cell membrane of the target cells are called membrane-bound receptors and the receptors present inside the target cell are called intracellular receptors, mostly nuclear receptors (present in the nucleus. 

So the correct answer is are received by a receptor located in the plasma membrane.

Read the following pioints :- 
(i) Increase GFR
(ii) Increase B.P
(III) Decreases Blood Volume
(iv) Increases aldosterone secretion 
(v) Vasoconstrictor
(vi) Increases Na excretion
How many points are correct about angiotensin II?

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Two

  2. Three

  3. Four

  4. Five

Show answer
Correct Option: A
Explanation:

Angiotensin II - is a vasoconstrictor which causes an increase in BP (means a decrease in blood volume),  increase Na+ reabsorption, does not alter GFR, Angiotensin II can stimulate aldosterone secretion. 

So, the correct option is 'Two'. 

Choose the correct answer from the alternatives given.
Which of the following is not true concerning glucocorticoids?

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. They help to control electrolyte balance

  2. They help promote normal metabolism

  3. They help, provide resistance to stress

  4. They provide the body with energy through gluconeogenesis

Show answer
Correct Option: A
Explanation:

Glucocorticoids stimulate, gluconeogenesis, lipolysis, and proteolysis; and inhibit cellular uptake and utilization of amino acids. Cortisol is involved in maintaining the cardiovascular system as well as the kidney functions. Glucocorticoids, particularly cortisol, produces anti-inflammatory reactions and suppress the immune response. Cortisol stimulates the RBC production.

So the correct answer is they help to control electrolyte balance.

Which of the following options is correct?
     Steno thermal                                         Eurythermal 
      organism                                                organism            

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Frog, Lizard

  2. Frog, Man

  3. Man, Lizard

  4. Polar bear, Coconut tree

Show answer
Correct Option: B
Explanation:

Organisms with narrow range of temperature tolerance are called steno thermal organisms, e.g. polar bear, frog, lizards, coconut, etc. The organisms with wide range of temperature tolerance are called eurythermal organisms e.g. most mammals and birds. 

Which among the following amino-acids is not essentially required for health?

zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

  1. Cystenine

  2. Leucine

  3. Phenylalanine

  4. Tyrosin

Show answer
Correct Option: A
Explanation:

Cysteine is a nonessential amino acid (protein building block), meaning that cysteine can be made in the human body. Cysteine is one of the few amino acids that contains sulfur . Cysteine is a component of the antioxidant glutathione . The body also uses cysteine to produce taurine , another amino acid. So, the correct option is "A" (Cystenine).