Reflex action involves

Which one of the following is responsible for the control of reflex action?

...... is not involved in the knee-jerk reflex.

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

The various components of a reflex arc are given below:
$i.$ Effector organ
$ii.$ Interneuron
$iii.$ Motor neuron
$iv.$ Sensory neuron
$v.$ Sensory receptors
Choose the correct sequence of action potential transmission after the sensory receptors are stimulated.

Conditioned reflexes are different from unconditioned reflexes in that: