Answer: Unconditioned (inborn) spinal reflex.
- A A conditioned reflex learned through repeated practice
- B Unconditioned (inborn) spinal reflex
- C A response primarily mediated through higher brain centers
- D Behavior shaped mainly through repeated learning experience
Correct answer: B. Unconditioned (inborn) spinal reflex
Explanation: The knee-jerk (patellar tendon reflex) is a monosynaptic spinal reflex. It does not require brain processing.
Structure of a neuron. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Brain, spinal cord, neurons, reflex arcs, and sense organs.