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प्रश्न
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
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उत्तर
Stimulus : Receptor :: Impulse : Effectors.
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संबंधित प्रश्न
How do we detect the smell of an incense stick (agarbatti)?
What are the various sense organs in our body?
Give the functions of medulla.
Give the flow chart of a spinal reflex arc.
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
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.
Write down the following activities in the correct order for a simple reflex arc:
(a) impulse travels in the motor fibre
(b) impulse travels in the sensory fibre
(c) effector organ stimulated
(d) impulse crosses the synapse
Mention, if the following statement is True or False
A reflex action is a spontaneous response to a stimulus.
Why have reflex arcs evolved in animals?
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
