Advertisements
Advertisements
Question
How are involuntary actions and reflex actions different from each other?
Advertisements
Solution 1
Involuntary action is a set of muscle movements that do not require thinking. However, it is controlled by the brain, for example, the beating of the heart. On the other hand, reflex action is rapid and spontaneous in response to any stimulus. For example, closing one's eyes immediately when a bright light is focused.
Solution 2
| Involuntary actions | Reflex actions |
| These are normal involuntary actions of internal or external organs of the body. | These are sudden involuntary responses to external stimuli. |
| They occur in reaction to internal cues. | They operate in opposition to damaging stimuli, most of which are external. |
| They are related to how interior body parts work | They are related to emergencies, that is, reactions to external stimuli. |
| It occurs without the organism's volition. Heart rate, breathing, etc., as examples. | The brain, not the spinal cord, is involved in several reflexes. |
| These actions are controlled by the brain. | These actions are controlled by the spinal cord. |
APPEARS IN
RELATED QUESTIONS
Which part of the brain maintains posture and equilibrium of the body?
What is the role of the brain in reflex action?
Name one gustatory receptor and one olfactory receptor present in human beings.
What are the various sense organs in our body?
Which of the following helps in maintaining posture and balance of the human body?
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
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
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.
List in tabular form two differences between reflex action and walking.
State whether the following is
Salivation when food is put in the mouth.
Complete the following sentence with appropriate Word
The control of reflex action is through:
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Give an example for conditioned reflexes.
What will you do if someone pricks your hand with a needle? Elucidate the pathway of response with a neat labelled diagram.
Which one of the following is not a simple reflex?
Which of the following is not an involuntary action?
What kind of reflex is cycling?
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sneezing
