Question

Which of the following is responsible for control of reflex actions?
a. Motor nerves
b. Sensory Nerves
c. Spinal cord
d. Sympathetic nervous system

Answer 1

The main hint for this question is that generally these reflex actions are uncontrollable, and had to pass through the spinal cords. Motor nerves are those which originate from the spinal cords and carry the responses. Sensory nerves are responsible for sending the signals to the relay neurons.

Complete answer:
- A reflex arc is a kind of neural pathway, which mainly controls the action reflex. Mostly in the higher animals, most of the sensory neurons do not pass directly into the brain.
But in the case of synapses in the spinal cord that is the central nervous system.

- This character allows the reflex actions to be occurring relatively quicker which is done by activating the spinal motor neuron without the delay of sending signals through the brain.

- Motor nerves control the movement of nerves and actions by passing information from your brain and spinal cord to your muscles.

- The nerve cells which are present within the nervous system and responsible for converting external stimuli from the organism’s environment into internal electrical impulse is known as sensory nerves.

- The body’s rapid involuntary system response to dangerous or stressful situations is directed by the sympathetic nervous system.

Hence, The correct answer is option (C).

Additional information:
- There are mainly two types of reflex arc present, first of this is the somatic reflex arc and second, of this is the autonomic reflex arc.
- The autonomic reflex arc generally affects the inner organs and the somatic reflex arc affects the muscles.
- Autonomic reflex arc mainly deals with the spinal cord and the somatic reflex arc deals with the brain in comparison to the spinal cord.

Note:
- Mostly this reflex action takes place without the conscious manner of an organism. These actions are controlled by the spinal cord. Whenever the damage takes place in the spinal cords, the message from the brain cannot get through the spinal cords and these reflex actions also suffer.
- Reflex arc takes place when the skin detects any type of stimulus takes an example for the rise in temperature, sensory neurons send the signals to the relay neuron then the motor nerves transmit and send the signals to the effectors and then effectors do the response like moving the hand away.