Innate reflex and Knee-jerk reflex

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

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

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

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