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प्रश्न
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
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उत्तर
The pathway taken by nerve impulses in a reflex action is called a reflex arc. It is an automatic response to a stimulus. When a stimulus is given to a receptor, the receptors produce an impulse in the sensory fibre. The sensory fibre carries this message in the form of an electrical stimulus across the synapse. From the synapse, the impulse travels in the motor fibre and stimulates the effector organ to produce the desired response.
The correct order for a simple reflex arc is:
(b) →(d) → (a) → (c).
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संबंधित प्रश्न
Name the most important part of the human brain.
State one function each of cerebellum and pons.
Write the names of the regions in hindbrain. Give one function of each region.
Name the function of cerebrum.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
Define reflex arc. Give the flow chart of a spinal reflex arc.
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
The contraction of pupil of the eye in the presence of bright light is an example of :
(a) Voluntary reflex
(b) Spinal reflex
(c) Cerebral reflex
(d) Adrenal reflex
Differentiate between the following pair of terms:
Stimulus and impulse
Multiple choice question. Tick (✓) the correct choice:
Reflex actions occur under the control of
- brain
- medulla oblongata
- spinal cord
- cerebrum
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
Reflex action is controlled by the
State whether the following is simple reflex, conditioned reflex or neither of the two.
Knitting without looking
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Blinking
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
Complete the following sentence with appropriate Word
The control of reflex action is through:
Which one of the following is not a simple reflex?
