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प्रश्न
Define the following:
Reflex action
Define the following term:
Reflex action
Define reflex action.
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उत्तर
Reflex action is an automatic/quick/immediate, involuntary action in the body brought about by a stimulus. This mechanism prevents injury to the body by triggering a rapid and automatic response.
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संबंधित प्रश्न
Name one gustatory receptor and one olfactory receptor present in human beings.
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.
Write the names of the regions in hindbrain. Give one function of each region.
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(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
One of the following controls the peristaltic movements of alimentary canal. This one is :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
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Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sudden application of brakes of the cycle on sighting an obstacle in front
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Playing on the Keyboard
What type of reflex is the following?
Sweating in summer
Mention, if the following statement is True or False
Reflex action involves brain
Complete the following sentence with appropriate Word
The control of reflex action is through:
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
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Which one of the following is not a simple reflex?
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What kind of reflex is cycling?
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sneezing
