Home
Class 11
BIOLOGY
At the end of repolarization, the nerve ...

At the end of repolarization, the nerve membrane gets hyperpplarized. Why ?

Text Solution

Verified by Experts

At the end of repolarization, the membrane potential inside the axolemma becomes negative due to the efflux of `K^+` ions. When it becomes more negative than the resting potential -70 mV to about - 90mV, it becomes hyperpolarised.
Promotional Banner

Topper's Solved these Questions

  • NEURAL CONTROL AND COORDINATION

    FULL MARKS|Exercise IN-TEXT QUESTIONS SOLVED|4 Videos

  • NEURAL CONTROL AND COORDINATION

    FULL MARKS|Exercise CASE-STUDY SOLVED|1 Videos

  • NEURAL CONTROL AND COORDINATION

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (Long Answer Questions:)|25 Videos

  • MINERAL NUTRITION

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED - MULTIPLE CHOICE QUESTIONS|5 Videos

  • ORGAN AND ORGAN SYSTEMS IN ANIMALS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS SOLVED (III Answer the following Questions)|35 Videos

Similar Questions

Explore conceptually related problems

Explain the following processes: (a) Polarisation of the membrane of a nerve fibre. (b) Depolaristion of the membrance of a nerve fibre. (c ) Conduction of nerver impulse along a nerve fibre. (d) Transmission of a nerve impulse across a chemical synapse.

When the key is closed, a spark is generated between the ends of the rods. a. Explain the cause of the spark. b. Explain why a spark is also produced when the key is opened. c. Why are no sparks produced when the key is left closed?

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the,plasma membrane has which type of electric charge?

Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surfaces of the two spheres? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its flatter portions.

Explain the membrane present at the caudal end of the yolk sac.

A bar magnet of length 21 cm and pole strength m is placed in a uniform magnetic field , B inclined at angle 'theta' with the field . a. What is the force acting on each pole ? b. Why the magnet gets a rotating effect ?

Figure shows a light rod of length l rigidly attached to a small heavy block at one end and a hook at the other end. The system is released from rest with the rod in a horizontal position. There is a fixed smooth ring at a depth h below the initial position of the hook and the hook gets into the ring as it reaches there. What should be the minimum value of h so that the block moves in a complete circle about the ring?

Spring fitted doors close by themselves when released. You want to keep the door open for a long time, say for an hour. If you put a half kg stone in front of the open door, it does not help. The sotne slides with the door and the door gets closed. However, if you sandwitch a 20 g of wood in the small gap between the door and the floor, the door stays open. Explain why a much lighter peice of wood is able to keep the door open while the heavy fails.