Tag: endocrine system and hormone

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

Biogenic amines are synthesized from

  1. Tryptophan

  2. Tyrosine

  3. Glutamic acid

  4. Phenylalanine
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

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

  1. Gastrin

  2. Thymosin

  3. Estrogen

  4. Prostaglandins
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice zoology endocrine system and chemical co-ordination classification of hormones endocrine system and hormone hormones and metabolism

Supra optic nuclei (in hypothalamus) secrete the hormone.

  1. ADH

  2. Oxytocin

  3. Pitocin

  4. Both (2) and (3)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The supraoptic nuclei of the hypothalamus primarily synthesize ADH (vasopressin), while the paraventricular nuclei primarily synthesize oxytocin. Both are transported to and released by the posterior pituitary.

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

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

  1. Are water soluble

  2. Contain carbon and hydrogen

  3. Enter through pores

  4. Are lipid soluble
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Steroid hormones are derived from cholesterol and are hydrophobic (lipid-soluble). This property allows them to diffuse directly through the lipid bilayer of the plasma membrane.

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

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

  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)
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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?

  1. Two

  2. Three

  3. Four

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

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Frog, Lizard

  2. Frog, Man

  3. Man, Lizard

  4. Polar bear, Coconut tree
Reveal answer Fill a bubble to check yourself
B Correct answer
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. 

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

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

  1. Cystenine

  2. Leucine

  3. Phenylalanine

  4. Tyrosin
Reveal answer Fill a bubble to check yourself
A Correct answer
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).