Inborn reflex and Knee-jerk reflex

Inborn reflex noun - An automatic instinctive unlearned reaction to a stimulus.

Knee-jerk reflex and inborn reflex are semantically related. In some cases you can replace phrase "Knee-jerk reflex" with "Inborn reflex", this phrases are similar.

Knee-jerk reflex noun - A reflex extension of the leg resulting from a sharp tap on the patellar tendon.

Inborn reflex and knee-jerk reflex are semantically related. You can use "Inborn reflex" instead a noun phrase "Knee-jerk reflex".