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प्रश्न
Mention, if the following statement is True or False
A reflex action is a spontaneous response to a stimulus.
पर्याय
True
False
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उत्तर
False
Correct Statement: A reflex action is a spontaneous involuntary response to a stimulus.
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संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
Name one gustatory receptor and one olfactory receptor present in human beings.
Write the names of the regions in hindbrain. Give one function of each region.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
Which of the following are cerebral reflexes?
(i) a person pulls away his hand on touching a hot object
(ii) a person spits out immediately when a fly enters his mouth while talking
(iii) A person walking bare foot lifts his foot at once on stepping on to a nail
(iv) A person's pupil contracts at once in the presence of bright light
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (ii) and (iv)
When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our fingers. The receptor triggers and impulse in neuron Q which transmits the message to an organ R which is a part of the central nervous system. Here the impulse is passed on to a neuron S which in turn passes it to a yet another neuron T. The neuron T passes the impulse to a tissue U in our arm. The tissue U then contracts and pulls our hand away from the hot plate.
(a) What is the name of (i) receptor P (ii) neuron Q, and (iii) organ R?
(b) What is (i) neuron S, and (ii) neuron T?
(c) Name the tissue U.
(d) What name is given to the phenomenon in which hand is pulled away quickly from the hot plate?
(e) Name the effector in this whole process.
Give one example of a conditioned reflex in your own life.
Give Technical Term:
Response to a stimulus without the intervention of the will of an animal.
In reflex action, the reflex arc is formed by ______
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
