Reflex actions are mediated througha)brainb)effectorsc)spinal cordd)receptorsCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Spinal cord acts as the main center for reflex actions. Spinal cord acts as a link between spinal nerves and brain. Thus it participates in conscious actions. Reflex actions is defined as an involuntary action performed by muscles under the direction of spinal cord in response to the stimulus.Hence option (c) is the correct answer

Answer

reflex action are mediated through our spinal cord. most sensory neurons do not pass directly into the brain, but synapse in the spinal cord , this characteristic allows reflex actions to take place...

Answer

Reflex actions are involuntary and rapid responses to a stimulus that occur without conscious thought. These actions are mediated through the spinal cord. Let's understand why the correct answer is option 'C' - spinal cord.

1. Definition of reflex actions:
- Reflex actions are automatic responses to specific stimuli that help protect the body and maintain homeostasis.
- These actions are designed to occur quickly and without the need for conscious thought or decision-making.

2. Components of a reflex arc:
- A reflex arc is the neural pathway that controls a reflex action.
- It involves five main components: receptor, sensory neuron, interneuron, motor neuron, and effector.

3. Role of receptors:
- Receptors are specialized cells or structures that detect stimuli from the internal or external environment.
- They convert the stimulus into an electrical signal that can be transmitted to the central nervous system (CNS).

4. Role of sensory neurons:
- Sensory neurons transmit the electrical signals generated by the receptors to the CNS.
- They carry the information from the receptor to the spinal cord, which acts as the primary integration center for reflex actions.

5. Role of interneurons:
- Interneurons are located within the spinal cord and serve as connectors between sensory and motor neurons.
- They receive the sensory input and process it to generate an appropriate response.

6. Role of motor neurons:
- Motor neurons are responsible for transmitting signals from the CNS to the effectors, which are usually muscles or glands.
- They carry the response generated by the interneurons to the effector organ.

7. Role of effectors:
- Effectors are the muscles or glands that carry out the response to the stimulus.
- In reflex actions, the effector is usually a muscle that contracts or relaxes in response to the signal from the motor neuron.

8. Role of the spinal cord:
- The spinal cord plays a crucial role in reflex actions as it serves as the integration center for the reflex arc.
- It receives the sensory input, processes it through interneurons, and generates an immediate motor response without involving the brain.
- This quick response allows the body to react rapidly to potential harm or danger.

In summary, reflex actions are mediated through the spinal cord because it acts as an integration center for the reflex arc. The sensory input from receptors is transmitted to the spinal cord, where it is processed and generates an immediate motor response through interneurons and motor neurons. The spinal cord bypasses the brain in reflex actions to ensure quick and automatic responses to stimuli.

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