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प्रश्न
Reflex action is controlled by the
पर्याय
brain
spinal cord
autonomic
peripheral nervous system
उत्तर
spinal cord
APPEARS IN
संबंधित प्रश्न
What is meant by receptors and effectors? Give two examples of each.
What is a reflex action? Explain with the help of an example.
P is a cell (or group of cells) in the human body which is sensitive to a particular type of stimulus and conveys the messages to CNS through nerves Q. On the other hand, R is a part of the human body which can respond to a stimulus according to the instructions sent from the CNS through nerves S.
(a) What is P? Name five organs which contain cells (or group of cells) like P.
(b) Name the nerves Q.
(c) What is R? Give two examples of R.
(d) Name nerves S.
(e) How do messages travel through the nerves Q and S?
Define voluntary and reflex actions. Give examples of each.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sudden application of brakes of the cycle on sighting an obstacle in front
Explain the mechanism of reflex action with the help of a suitable diagram.
Explain the following term :
Conditioned reflex
State whether the following is
The sudden application of brakes without thinking
Why have reflex arcs evolved in animals?
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
