Question

4.
When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our
fingers. The receptor triggers an 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 then contracts and pulls our hand away from the hot plate,
(a) What is the name of the (i) receptor P (ii) Organ R?
(b) What is neuron Q and neuron S?
(c) Name the neuron T and tissue U
(d) What name is given to the phenomenon in which hand is pulled away quickly from the
hot plate?​

Answer 1

Answer:

Q = sensory neuron

S = mortor neuron

U = effector tissue/muscle

Reflex arc

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