Advertisements
Advertisements
प्रश्न
How are involuntary actions and reflex actions different from each other?
Advertisements
उत्तर १
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.
उत्तर २
| 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
संबंधित प्रश्न
With the help of a neat and labelled diagram, describe reflex arc.
Name the most important part of the human brain.
Name two parts of the body which contain receptors of chemical stimuli.
Write the names of the regions in hindbrain. Give one function of each region.
A person walks across a room in barefeet and puts his foot on a drawing pin lying on the floor. He lets out a cry. Explain what happens in his nervous system in bringing about this response.
What is a reflex action? Explain with the help of an example.
Give the various functions of brain.
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
Which of the following is not an involuntary action?
(a) vomiting
(b) chewing
(c) heart beat
(d) salivation
One of the following controls the peristaltic movements of alimentary canal. This one is :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
P is a cell (or group of cells) in the human body which is sensitive to a particular type of stimulus and conveys the messages to CNS through nerves Q. On the other hand, R is a part of the human body which can respond to a stimulus according to the instructions sent from the CNS through nerves S.
(a) What is P? Name five organs which contain cells (or group of cells) like P.
(b) Name the nerves Q.
(c) What is R? Give two examples of R.
(d) Name nerves S.
(e) How do messages travel through the nerves Q and S?
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
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:
Sneezing: …………….
List in tabular form three distinguishing features between cerebrum and cerebellum.
State whether the following is
Playing on the Keyboard
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Reflex arc allows the rapid response of the body to a stimulus.
