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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
With the help of a neat and labelled diagram, describe reflex arc.
Give examples of unconditional reflexes
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
Name two parts of the body which contain receptors of chemical stimuli.
Give three examples of reflex actions.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the cells in your nasal passages which perceive the smell?
Give the various functions of brain.
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
Which of the following helps in maintaining posture and balance of the human body?
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
One of the following gives the correct sequence of the components in a reflex arc. This is:
Differentiate between the following pair of terms:
Stimulus and impulse
Complete the following statement by choosing the correct alternative from the choice given in bracker:
Reflex action is controlled by
(i) brain (ii) spinal cord
(iii) autonomic (iii) peripheral nervous system
State whether the following is simple reflex, conditioned reflex or neither of the two.
Knitting without looking
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Cleaning
What type of reflex is the following?
Formation of goose-pimples in cold weather.
Which sensory organ is involved in vertigo (sensation of oneself or objects spinning around)?
