Tag: endocrine system and chemical co-ordination
Questions Related to endocrine system and chemical co-ordination
Epinephrine and eicosanoids finds their receptors on
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Cell wall
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Plasma membrane
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Inner matrix
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None of these
- Eicosanoids are compounds that include prostaglandins, prostacyclins, leukotrienes, and thromboxanes.
- Lipid insoluble hormones such as eicosanoids bind to receptors on the outer surface of the plasma membrane, via plasma membrane hormone receptors.
- The amino acid-derived hormones epinephrine and norepinephrine bind to beta-adrenergic receptors on the plasma membrane of cells.
- Hence the Epinephrine and eicosanoids find their receptors on the plasma membrane.
- So, the correct answer is 'Plasma membrane'.
Read the following carefully to give the correct answer
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Protein hormone interact with the intra cellular receptor
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Iodothyronine hormone generate secondary messenger after interaction with receptor
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Hormone is a cell specific
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Somatostatin hormone secrete only by hypothalamus
Tyrosine act as a precursor for which of the following hormones?
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Thyroid
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Adrenal
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Prolactin
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FSH
- Thyroxine (3,5,3',5'-tetraiodothyronine) is the thyroid hormone produced by follicular cells of the thyroid gland.
- Thyroxine hormone is produced in the thyroid gland from tyrosine and iodine.
- Hence the precursor for the synthesis of thyroid hormone is amino acid Throne.
- Tyrosine (symbol Tyr or Y) or 4-dihydroxyphenylalanine is one of the 20 standard amino acids.
- So, the correct answer is 'Thyroid'.
The stomach pain impulses are received by receptors known as
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Proprioreceptors
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Exteroreceptors
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Visceral receptors
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Chemoreceptors
a) Proprioceptors are the mechanoceptors which are activated by changes in pressure or movement and are involved in maintaining muscle tone, body equilibrium and posture.
Intracellular receptors are mostly ?
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cytoplasmic receptors
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membrane receptors
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nuclear receptors
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ER receptors
The signal transduction of steroid hormone across cell is through
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Binding of hormone to the cytoplasmic receptor and the complex binds to hormone response element on DNA with promoter DNA
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Binding of hormone to the transmembrane receptor which initiates the production of second messenger that activates enzymes which further activates transcription factors
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Binding of hormone to the transmembrane receptor which diffuse inside the cell cytoplasm and then activates the enzyme necessary for the activation of transcription factors
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Binding of hormone to the cytoplasmic receptor that initiates the production of second messenger which activates enzymes that further activates transcription factors
Steroid hormones, i.e., androgens, estrogens, glucocorticoids, mineralocorticoids, and progestins, bind with high affinity to their respective steroid hormone receptors (SR).
Membrane bound receptors and hormones produce second messengers like _____.
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Renin
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$IP _3$
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ANF
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GHRF
The elevated concentrations of cAMP indicates
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The activation of a cAMP-dependent protein kinase called protein Kinase A
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The activation of membrane receptors
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The splitting of ATP
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None of these
The ions which plays major role in generating hormone action
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Calcium ions
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Magnesium ions
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Sodium ions
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None of these
The ions which plays major role in generating hormone action is calcium ions. They make bones strong and powerful.
Which of the following hormones triggers the release of androgens?
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FSH
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ACTH
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LH
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None of the above
- The hypothalamus secretes gonadotropin-releasing hormone (GnRH) which stimulates the pituitary gland into secreting luteinizing hormone (LH) and follicle-stimulating hormone (FSH).
- LH stimulates testicular Leydig cell secretion of Testosterone whereas FSH stimulates spermatogenesis in Sertoli cells of the seminiferous tubules.
- An androgen is any natural or synthetic steroid hormone that regulates the development and maintenance of male characteristics in vertebrates by binding to androgen receptors.
- The major androgen in males is testosterone. Hence, LH hormones trigger the release of androgens.