The diagram shows a reflex arc in which a bee sing causes the arm to be moved quickly?
If the relay neuron is damaged, how will the transmission of nerve impulses in the reflex are be affected?
A. Impulses cannot pass from p- Q
B. Impulses cannot pass from p- R
C. Impulses cannot pass from Q- P
D. Impulses cannot pass from R- Q
Answers
Explanation:
Reflex reactions in humans are controlled by the reflex arc. When the safety of an organism demands a very quick response, the signals may be passed directly from a sensory neuron, via a relay neuron, to a motor neuron for an instant, unthinking action. This is a reflex action. A reflex arc is the nerve pathway that makes such a fast, automatic response possible. It does not matter how brainy you are you will always pull your hand away from a flame without thinking about it. It is in-built, or innate, behavior, and we all behave in the same way. The parts of the reflex arc are P- sensory neuron, Q- motor neuron, R- effector, S- center (where generally the sensory neuron synapses with the motor neuron).
Answer:
option C is correct (impulses cannot paas from Q-P)