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प्रश्न
Which part of the eye contains cells which are sensitive to light?
उत्तर १
The retina of an eye contains light-sensitive cells.
उत्तर २
The retina is the part of the eye which contains cells that are sensitive to light.
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संबंधित प्रश्न
With the help of a neat and labelled diagram, describe reflex arc.
Fill in the following blanks with suitable words :
Our.............system allows us to react to our surroundings. Information from receptors passes along...........neurons to our brain. Our brain sends impulses along..........neurons to our muscles.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
Give one example of a conditioned reflex in your own life.
State whether the following is
Playing on the Keyboard
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Which one of the following is not a simple reflex?
What kind of reflex is cycling?
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.
