Advertisements
Advertisements
प्रश्न
What is a reflex action?
What is meant by Reflex action?
Advertisements
उत्तर १
Reflex action is a sudden, spontaneous, automatic, involuntary response to a stimulus.
उत्तर २
Reflex action is an autonomic, quick and involuntary action in the body brought about by a stimulus.
APPEARS IN
संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
How do we detect the smell of an agarbatti (incense stick)?
State one function each of cerebellum and pons.
State whether coughing is a voluntary action or reflex action.
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.
What is the difference between a voluntary and an involuntary action? Which kind of action is digestion? Explain your choice.
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the cells in your nasal passages which perceive the smell?
Give the various functions of brain.
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
Your are driving your bicycle at a fast speed. Suddenly, a small boy comes in front of your cycle and, without wasting any time in thinking, you immediately apply the brakes and accident is avoided. What name is given to such an action?
Two hungry boys (A and B) enter a restaurant and find a table decorated as follows:

Boy B starts salivating but not A. Explain the reason for this difference.
Explain the mechanism of reflex action with the help of a suitable diagram.
State whether the following is simple reflex, conditioned reflex or neither of the two.
Lifting up a book
What type of reflex is the following?
Solving mathematical sums
In reflex action, the reflex arc is formed by ______
Differentiate between Voluntary and involuntary actions.
Which of the following is an example of unconditioned reflex?
Which of the following is not an involuntary action?
What kind of reflex is cycling?
