Question

A frog with crushed brain is pinched on the leg. The leg is drawn away. It is

• A. Automatic motor response
• B. Neurotransmitter induced response
• C. Conditional reflex
• D. Simple reflex

Answer 1

The correct option is D Simple reflex

• This is an example of a simple reflex that is involved with the spinal cord as this action gets completed without the information reaching the brain. So, there is no involvement of the brain.
• When the leg of the frog is pinched, the stimulus is received by receptors on the skin that set up a sensory impulse.
• This impulse is carried to the spinal cord that transforms the sensory impulse into a motor impulse.
• This impulse is then transmitted to the leg muscles.
• Simple reflex is the spontaneous automatic mechanical response to a stimulus without animals' will.

So, the correct option is (D).