When muscles lengthen, the spindles are stretched. This stretch activates the muscle spindle which in turn sends an impulse to the spinal cord. This impulse results in the activation of more motor neurons at spinal level that send an impulse back to the muscle.
What is the pathway of a reflex arc?
A reflex arc defines the pathway by which a reflex travels—from the stimulus to sensory neuron to motor neuron to reflex muscle movement.
Which of the following list the parts of a reflex arc in correct order?
Stimulus, sensory neuron, intermediary neuron, motor neuron and defector organ is the correct order of general reflex arc.
What response does the inverse stretch reflex initiate in a muscle?
The Golgi tendon reflex (also called inverse stretch reflex, autogenic inhibition, tendon reflex) is an inhibitory effect on the muscle resulting from the muscle tension stimulating Golgi tendon organs (GTO) of the muscle, and hence it is self-induced.
What receptors initiate the inverse stretch reflex?
The Inverse Myotatic Reflex Involves Sensors of Muscle Force in the Tendon. Stretch receptors called Golgi tendon organs are found within the collagen fibers of tendons and within joint capsules.
Which is the correct order of events in a reflex arc?
What is the first step in the activation of a reflex arc?
5 steps in Neural Reflex. Step 1: Arrival of stimulus, activation of receptor. Physical or chemical changes. Step 2: Activation of sensory neuron, graded depolarization. Step 3: Information processing by postsynaptic cell.
How does the Golgi tendon reflex work?
The Golgi tendon reflex operates as a protective feedback mechanism to control the tension of an active muscle by causing relaxation before the tendon tension becomes high enough to cause damage. Second, the motor neuron from the spinal cord is inhibited via an IPSP and muscle relaxes.
What is the correct sequence of a reflex?
Receptors → spinal cord → sensory neuron → motor neuron → muscle.
What is the pathway of muscle spindles?
The pathway starts when the muscle spindle is stretched (caused by the tap stimulus in the knee jerk reflex). The muscle spindles are responsible for detecting the length of the muscles fibres.
What are the 5 components of the reflex pathway?
The pathway can be described as a ‘reflex arc’ which is made up of 5 components: 1 A receptor – muscle spindle 2 An afferent fibre – muscle spindle afferent 3 An integration centre – lamina IX of spinal cord 4 An efferent fibre – α-motoneurones 5 An effector – muscle More
What are the types of reflexes in the spinal cord?
Spinal reflex 1 Basics. The spinal cord is phylogenetically older than most structures of the brain, which means that reflexes are in charge of carrying out functions that the organism needs the most. 2 Monosynaptic reflex. The monosynaptic reflexes consist of two neurons. 3 Polysynaptic reflexes.
What is a monosynaptic reflex Quizlet?
A monosynaptic reflex, such as the knee jerk reflex, is a simple reflex involving only one synapse between the sensory and motor neurone. The pathway starts when the muscle spindle is stretched (caused by the tap stimulus in the knee jerk reflex). The muscle spindles are responsible for detecting the length of the muscles fibres.
