Knee-jerk reflex and Reflex response

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

Reflex response and knee-jerk reflex are semantically related. In some cases you can use "Reflex response" instead a noun phrase "Knee-jerk reflex".

Reflex response noun - An automatic instinctive unlearned reaction to a stimulus.

Knee-jerk reflex and reflex response are semantically related. Sometimes you can replace phrase "Knee-jerk reflex" with "Reflex response", this phrases are similar.