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प्रश्न
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.
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उत्तर
Our nervous system allows us to react to our surroundings. Information from receptors passes along the sensory neurons to our brain. Our brain sends impulses along the motor neurons to our muscles.
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संबंधित प्रश्न
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:
1) Name the phenomenon that is depicted in the diagram. Define the phenomenon.
2) Give the technical term for the point of contact between the two nerve cells.
3) Name the parts numbered 1, 2 and 3.
4) How does the arrangement of neurons in the spinal cord differ from that of the brain?
5) Mention two ways by which the spinal cord is protected in our body.
Name the most important part of the human brain.
Which part of the eye contains cells which are sensitive to light?
Give three examples of reflex actions.
State whether coughing is a voluntary action or reflex action.
Fill in the following blank with suitable word :
A neuron which carries an impulse to the brain is called a ........... neuron.
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the gland which is stimulated to secrete saliva.
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
One of the following gives the correct sequence of the components in a reflex arc. This is:
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
Explain the mechanism of reflex action with the help of a suitable diagram.
Define the following:
Reflex action
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Cleaning
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Solving mathematical sums
In reflex action, the reflex arc is formed by ______
If after cutting through dorsal root of a spinal nerve of a mammal, the associated receptor in skin was stimulated the animal would ______.
