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प्रश्न
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
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उत्तर
| beating of heart | reflex actions |
| Involuntary actions are the actions which are not controlled by our will. |
Reflex actions are the sudden action in response to something. |
| They do not need any kind of stimulus to work. |
They required stimulus for its action. |
| These actions are regulated by the brain. | These actions are regulated by the spinal cord. |
| They do not involve skeletal muscle. | They do involve skeletal muscle. |
|
These actions are performed |
These actions are produced in |
| This action may be quick or slow. | Reflex actions are always quick. |
APPEARS IN
संबंधित प्रश्न
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Which of the following is not a natural reflex action?
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
 |
- 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.
