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प्रश्न
Which of the following are cerebral reflexes?
(i) a person pulls away his hand on touching a hot object
(ii) a person spits out immediately when a fly enters his mouth while talking
(iii) A person walking bare foot lifts his foot at once on stepping on to a nail
(iv) A person's pupil contracts at once in the presence of bright light
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (ii) and (iv)
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उत्तर
(d) (ii) and (iv)
Cerebral reflexes are those reflex actions which involve the brain. They occur in the organs present in the head as these organs are directly connected to the brain.
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संबंधित प्रश्न
How are involuntary actions and reflex actions different from each other?
Briefly explain the following terms : Reflex action
What are the various sense organs in our body?
What is a reflex action? Explain with the help of an example.
Give the various functions of brain.
The part of brain which controls the involuntary action such as heart beat, breathing, blood pressure, etc. is :
(a) pons
(b) medulla
(c) cerebrum
(d) cerebellum
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
Define voluntary and reflex actions. Give examples of each.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
List in tabular form two differences between reflex action and walking.
Give one example of a conditioned reflex in your own life.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Blushing
State whether the following is simple reflex, conditioned reflex or neither of the two.
Lifting up a book
Give Reason:
The hand automatically shows the direction to turn a cycle without thinking.
Give Technical Term:
The scientist, who conducted experiment on a dog to show conditioned reflex
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
Reflex actions are mediated through ____________.
The given diagrammatic representation of reflex action shows knee jerk reflex.
Identify the parts labeled as A to E and select the correct option.
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
