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प्रश्न
A reflex arc in man is best described as movement of stimuli from:
विकल्प
Receptor cell, sensory neuron, relaying neuron, effector muscles
Receptor cell, efferent nerve, relaying neuron, muscles of the body
Receptor cell, spinal cord, motor neuron, relaying neuron
Receptor cell, synapse, motor neuron, relaying neuron
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उत्तर
Receptor cell, sensory neuron, relaying neuron, effector muscles
Explanation:
The exact path of a reflex action is:
Receptor (receives stimulus) → Sensory nerve (carries signal) → Relaying neuron (inside spinal cord) → Effector muscles (responds)
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संबंधित प्रश्न
Briefly explain the following terms : Reflex action
State one function each of cerebellum and pons.
State whether coughing is a voluntary action or reflex action.
Name the function of cerebrum.
Differentiate between the following pair of terms:
Stimulus and impulse
What type of reflex is the following?
Blinking of the eye
In reflex action, the reflex arc is formed by ______
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
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- Name the phenomenon shown in the figure and define the same.
- Identify the parts labelled as 1 and 2. Write one functional difference between these two.
- Name the bony protective covering and the membranous protective covering of the spinal cord.
- Label the guidelines 3 and 4.
- How is the labelled part 3 different from part 4 with respect to its composition (part of neuron)?
- Give the technical term for the point of contact between the two nerve cells.
- Name the fluid filled inside the central canal of spinal cord.
- Name the term used for a small gap between two neurons.
- Give one example of a neurotransmitter.
- Draw a neat diagram of a nerve cell and label the parts: Perikaryon, Node of Ranvier, Myelin sheath and Axon terminals.
