If the light source in front of an eye becomes bright suddenly,what happens?

  • A
    Focus of lens will change
  • B
    Retinal blood supply will cut
  • C
    Vitreous humour becomes fluid
  • D
    Pupil will contract

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Similar Questions

Which sentences are $WRONG$ about acquired reflex action?
$I$. These are non-heritable.
$II$. These are permanent.
$III$. They may disappear or re-appear.
$IV$. Example is knee jerk.

Where is the cell body of the sensory neuron located in a reflex arc?

In a cross-section of the spinal cord,$A, B, C, D$ and $E$ represent:

Which one of the following reflexes does not involve the innervation of the brain?

Reflex action in a vertebrate is an essential display exhibited by

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