Question

Find the odd one from the following: blinking, knitting without looking, smiling, blushing, crying.

Answer 1

Reflexes

1. A reflex action is a sudden, involuntary, unplanned response given to a stimulus. It may or may not involve the brain.
2. A reflex action involves a sensory neuron, a connector or relay neuron, and a motor neuron. It is divided into two categories- unconditioned and conditioned reflexes.
3. A conditioned reflex is acquired during the lifetime and is not constant. Examples- Playing a musical instrument, salivation on smelling tasty food.
4. Unconditioned reflexes are present since birth and do not require us to develop a habit for them. Examples- Salivation in newborn baby on tasting milk.

Grouping of the above examples

1. In the above examples given, blinking, smiling, blushing, and crying are examples of unconditioned reflexes. They are present since birth and have natural reflexes to stimuli.
2. Knitting without looking is a skill obtained during one’s lifetime from practice. This is an example of the conditioned reflex.

Final answer

Knitting without looking is the odd one.