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Questions
What is the difference between reflex action and voluntary action?
Differentiate between the Following:
Reflexes and Voluntary actions
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Solution
| Reflexes (Involuntary actions) | Vohmtary actions | |
| 1. | Spontaneous due to simuli. | Deliberate due to intention. |
| 2. | Originate due to specific stimuli. | Originate due to thoughts. |
| 3. | Expressed as muscular movements or glandular secretion. | Expressed as muscular movements. |
| 4. | Carried out mostly by the spinal cord and autonomic nervous system, and very few by the brain. | All of them are initiated by the brain. |
| 5. | Mostly protective due to environmental stimuli. | Mostly proauctive i.e a choosing desired goal. |
RELATED QUESTIONS
Briefly explain the following terms : Reflex action
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 meant by receptors?
Which of the following is not an involuntary action?
(a) vomiting
(b) chewing
(c) heart beat
(d) salivation
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
The contraction of pupil of the eye in the presence of bright light is an example of :
(a) Voluntary reflex
(b) Spinal reflex
(c) Cerebral reflex
(d) Adrenal reflex
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?
State whether the following is simple reflex, conditioned reflex or neither of the two.
Contraction of eye pupil
Complete the following sentence with appropriate Word
The control of reflex action is through:
Reflex arc allows the rapid response of the body to a stimulus.
