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प्रश्न
Fill in the following blanks with suitable words :
Our.............system allows us to react to our surroundings. Information from receptors passes along...........neurons to our brain. Our brain sends impulses along..........neurons to our muscles.
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उत्तर
Our nervous system allows us to react to our surroundings. Information from receptors passes along the sensory neurons to our brain. Our brain sends impulses along the motor neurons to our muscles.
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संबंधित प्रश्न
What is the role of the brain in reflex action?
How are involuntary actions and reflex actions different from each other?
Name two parts of the body which contain receptors of chemical stimuli.
What is spinal cord? What is its main function?
Define reflex arc. Give the flow chart of a spinal reflex arc.
One of the following gives the correct sequence of the components in a reflex arc. This is:
Which of the following statements are true?
(i) sudden action in response to something in the environment is called reflex action
(ii) sensory neurons carry electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
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
Put a tick mark (✓) against the correct alternative in the following statement:
The smell of good food causes watering of your mouth. It is a
what do we refer to in the nervous system when we say:
Natural and conditioned …………………
State whether the following is simple reflex, conditioned reflex or neither of the two:
Lifting up a book: …………………..
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
List in tabular form three distinguishing features between cerebrum and cerebellum.
What is a reflex action?
Which of the following is an example of unconditioned reflex?
Which of the following is not an involuntary action?
Which of the following is not involved in Knee-jerk reflex?
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
