Question

in a(n) ________ reflex, a sensory neuron synapses directly on a motor neuron. commensual polysynaptic monosynaptic contralateral ipsilateral

Explanation:

• Commensual: This term is not related to neural reflexes. It refers to a type of symbiotic relationship in biology.
• Polysynaptic: In a polysynaptic reflex, there are multiple synapses (more than one) between the sensory neuron and the motor neuron. There are interneurons involved in the pathway.
• Monosynaptic: A monosynaptic reflex has only one synapse. The sensory neuron directly synapses on the motor neuron.
• Contralateral: This term refers to something on the opposite side (e.g., contralateral reflex - the response is on the side opposite to the stimulus site). It does not describe the number of synapses.
• Ipsilateral: This term refers to something on the same side (e.g., ipsilateral reflex - the response is on the same side as the stimulus site). It does not describe the number of synapses.

Answer:

C. monosynaptic