Question

lo 6.7. the simplest arrangement of a reflex arc consists of the _, an _, and an _; together, these units form a functional group. sensory neuron, motor neuron, and gland detector, mediator, and muscle receptor, synapse, and muscle fiber sensor, neuron, and response receptor, interneuron, and effector

Explanation:

A reflex arc is the neural pathway of a reflex. The simplest reflex - arc consists of a receptor (which detects the stimulus), an interneuron (which processes the signal in the central nervous system), and an effector (which produces the response, like a muscle or gland).

Answer:

Receptor, interneuron, and effector