Home
Class 12
BIOLOGY
A : In the nervous system generation ...

A : In the nervous system generation of action potential depends upon influx of sodium ion into axoplasm.
R : Influx of sodium ion during nerve impulse generation is due to efflux of potassium ions .

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

C

If Assertion is true statement but Reason is false, then mark (3).

D

If both Assertion and Reason are false statements, then mark (4).

Text Solution

Verified by Experts

The correct Answer is:
C
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • NEURAL CONTROL AND COORDINATION

    AAKASH INSTITUTE|Exercise Assignment SECTION - C (Previous Year Questions )|64 Videos

  • MORPHOLOGY OF FLOWERING PLANTS

    AAKASH INSTITUTE|Exercise TRY YOURSELF|38 Videos

  • ORGANISMS AND POPULATIONS

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION-D) (Assertion-Reason Type Questions)|15 Videos

Similar Questions

Explore conceptually related problems

Sodium nitroprusside when added to an alkanie solution of sulphide ions produces purple colourations due to the formation of

Assertion (A): Action potential is generated due to the exit of sodium ions from the neuron through the plasma membrane. Reason (R): Movement of sodium ions through the plasma membrane takes place under the influence of a stimulus.

Knowledge Check

  • Which of the following ion moves first during the generation of an action potential along the axon?

    A
    `Mg^(2+)`
    B
    `Ca^(2+)`
    C
    `K^(+)`
    D
    `Na^(+)`

  • Action potential in neurons is generated by a rapid influx of ?

    A
    Chloride ions
    B
    Potassium ions
    C
    calcium ions
    D
    sodium ions

  • Depolarisation of nerve membrane takes place through influx of ….. Ions

    A
    calcium
    B
    potassium
    C
    sodium
    D
    magnesium

    • Similar Questions

    Explore conceptually related problems

    Influx of K^(+) inos into guard cells and efflux of H^(+) ions from guard cells lead to

    The steps involved in the mechanism of vision are given below. Arrange them in proper sequence and select the correct option. A. Dissociation of retinal from opsin and generation of potential difference in photoreceptor cells. B. Focusing of the light rays in visible wavelength on the corner through the lens. C. Generation of the action potential in ganglion cells through bipolar cells. D. Analysis of neural impulse and formation of aa image on the retina. E. Transmission of the action potential by the optic nerve to the visual cortex.

    Influx of K^(+)ions into guard cells and efflux of H^(+) ions from guard cells lead to

    Sodium and potassium ions maintain _____ .

    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

    Home
    Profile