MCQs on Reflexes

Which of the following is a component of a simple reflex arc?

• Sensory neuron

• Motor neuron

• Interneuron

• All of the above

Which reflex involves only one synapse between the sensory and motor neuron?

• Withdrawal reflex

• Stretch reflex

• Crossed-extensor reflex

• Golgi tendon reflex

What is the primary function of the Golgi tendon reflex?

• Initiate rapid contraction of muscles

• Maintain posture and balance

• Prevent excessive muscle tension and protect tendons

• Facilitate movement during locomotion

Which of the following is an example of a monosynaptic reflex?

• Knee-jerk reflex

• Withdrawal reflex

• Crossed-extensor reflex

• Golgi tendon reflex

The crossed-extensor reflex is most important for:

• Preventing muscle fatigue

• Maintaining balance after withdrawing a limb

• Reducing pain perception

• Coordinating eye movements

Where is the sensory information from a stretch reflex first processed?

• Cerebral cortex

• Brainstem

• Spinal cord

• Thalamus

Which structure detects muscle stretch in the stretch reflex?

• Golgi tendon organ

• Muscle spindle

• Interneuron

• Synapse

What happens during the Golgi tendon reflex when excessive tension is detected?

• The muscle contracts forcefully

• The antagonistic muscle contracts

• The muscle being stretched relaxes

• No response occurs

Which reflex involves both withdrawal of one limb and extension of the opposite limb?

• Monosynaptic reflex

• Crossed-extensor reflex

• Stretch reflex

• Golgi tendon reflex

What distinguishes polysynaptic reflexes from monosynaptic reflexes?

• Presence of interneurons

• Faster response time

• Lack of sensory neurons

• Direct connection between sensory and motor neurons