Home
Class 12
BIOLOGY
Assertion: Aldosterone is a steroid horm...

Assertion: Aldosterone is a steroid hormone and is important in the control of sodium and potassium ion concentration in mammals.
Reason: It upgrades sodium ioh concentration in the ECF by promoting reabsorption of sodium ions from renal tubules and excretion of potassium ions in urine

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ANIMAL KINGDOM -NONCHORDATES

    TRUEMAN BIOLOGY|Exercise MCQ|283 Videos
  • APPLICATION OF BIOTECHNOLOGY

    TRUEMAN BIOLOGY|Exercise Multiple Choice Questions|122 Videos

Similar Questions

Explore conceptually related problems

The ionic bond between sodium and chloride ion is stronger than that between potassium and chloride ion. Explain.

The product of molar concentrations of hydrogen ions and hydroxide ions in a 0.01 M aqueous solution of sodium chloride is known as

Assertion: In sodium chloride crystal, the co-ordination number of Na^(+) ion is six Reason: Sodium ion is smaller in size than chlorine ion

The inability to regulate the concentration of sodium ions in the blood could be due to the improper functioning of one of the following

The ionisation constant of phenol is 1.0xx10^(-10) . What is the concentration of phenolate ion in 0.05(M) phenol solution ? What will be its degree of ionisation if the solution is also 0.01(M) in sodium phenolate?

25.3g of Na_(2)CO_(3) is dissolved in enough water to make 250 ml of solution. If sodium carbonate dissociate completely, molar concentration of sodium ion, Na^(+) and carbonate ions, CO_(3)^(2-) are respectively-

[A] : Most of the solutes in ECF and cytoplasm are electrolytes, i.e., electrically charged par- ticles or ions. Maintenance of an equilibrium between intracellular fluid and ECF is vitally essential for all cells. [R]: This osmotic equilibrium is maintained by sodium and potassium pump of the cells. It operates with the help of a Na^+, K^+ ATP as enzyme located in the cell membrane.

Equivalent conductivity at infinite dilution for sodium potassium oxalate [(COO^(-))_(2)Na^(+)K^(+)] will be [given, molar conductivity of oxalate, K^(+)and Na^(+) ions at infinite dilute are 148.2, 50.1, 73.5" S.cm"^(2)."mol"^(-1) . Respectively -

TRUEMAN BIOLOGY-Animal Physiology -ASSERTION AND REASON
  1. [A] : Hair cells on the basilar membrane are responsible for hearing....

    Text Solution

    |

  2. [A]: Thyroid stimulating hormone is smallest peptide hormone. [R]: ...

    Text Solution

    |

  3. Assertion: Aldosterone is a steroid hormone and is important in the co...

    Text Solution

    |

  4. [A] : Cortisol is a protein hormone that regu- lates gluconeogenesis ...

    Text Solution

    |

  5. [A]: A tadpole whose thyroid gland has been removed does not metamorph...

    Text Solution

    |

  6. [A]: The regulation of RBC production is ac complished by the hormone ...

    Text Solution

    |

  7. [A] : Steroid hormones are similar to choles- terol in structure. [...

    Text Solution

    |

  8. [A] : The hormone aldosterone is secreted by adrenal cortex after the ...

    Text Solution

    |

  9. [A] : Prostaglandins are hormone like molecules produced by many body ...

    Text Solution

    |

  10. [A] : Placenta is a tissue in eutherian mam- mals that has both embryo...

    Text Solution

    |

  11. [A] : Testes are attached to abdominal wall by a ligament and under te...

    Text Solution

    |

  12. [A]: Emboly involves the invagination and involution through bottling ...

    Text Solution

    |

  13. [A]: In vertebrates, motor fibres to striped muscle, parasympathetic f...

    Text Solution

    |

  14. [A] : Keratin is one of a group of fibrous in- soluble proteins (scele...

    Text Solution

    |

  15. [A] : Macrophage is a large amoeboid cell that can engulf, ingest and ...

    Text Solution

    |

  16. [A] : Molecules of fatty acid, glycerol, sugars and amino acids are ab...

    Text Solution

    |

  17. [A] : Vitamins, A, D, E and K dissolve in fat and are absorbed with fa...

    Text Solution

    |

  18. [A] : Vitamins A, D, E and K are fat soluble while vitamin B complex ...

    Text Solution

    |

  19. [A] : In lower invertebrates the digestion is intracellular while in h...

    Text Solution

    |

  20. [A] : Pancreas is the second largest of the di- gestive glands. [R]...

    Text Solution

    |