In stretch reflex, the stimulus is: (A) Change in muscle length, (B) Change in muscle tension, (C) Pain in muscle, (D) Cessation of blood supply
Answer is A. The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length.Ref: Ganong&;s review of medical physiology 23rd edition Page no: 158