Question

The direction of response is opposite in which of the following reflex action?

• A. Biceps tendon relfex
• B. Knee jerk reflex
• C. Tricep tendon reflex
• D. Withdrawal reflex

Answer 1

The correct option is D Withdrawal reflex

There are 4 types of spinal reflex action, namely the stretch reflex, the Golgi tendon reflex, the crossed extensor reflex and the withdrawal reflex. The direction of response is opposite in withdrawal reflex action. The withdrawal reflex is also called as flexor withdrawal reflex. It protects the body from damaging stimuli. It is polysynaptic. Hence, it causes the stimulation of sensory, association and motor neurons. For example, when a person touches a hot iron, he withdraws his hand from it within fraction of seconds. In this, the heat stimulates temperature and danger receptors in the skin, triggering a sensory impulse that travels to the central nervous system. The sensory neuron synapses with interneurons and connects to motor neurons. These motor neurons send motor impulses to the flexors and allows withdrawal.

Thus, the correct answer is 'Withdrawal reflex.'