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प्रश्न
Give the various functions of brain.
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उत्तर
The various functions of the brain are as follows:
(i) It receives information-carrying nerve impulses from all the sensory organs of the body.
(ii) It responds to the impulses brought in by the sensory organs by sending instructions to the muscles and glands making them function accordingly.
(iii) It correlates the various stimuli from different sense organs and produces the most appropriate and intelligent responses.
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संबंधित प्रश्न
State whether coughing is a voluntary action or reflex action.
Fill in the following blank with suitable word :
A neuron which carries an impulse to the brain is called a ........... neuron.
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the smell of the food?
The involuntary actions in the body are controlled by :
(a) medulla in forebrain
(b)medulla in hindbrain
(c) medulla in spinal cord
(d) medulla in midbrain
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?
Put a tick mark (✓) against the correct alternative in the following statement:
The smell of good food causes watering of your mouth. It is a
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?
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Stimulus : Receptor :: Impulse : ______.
State whether the following is simple reflex, conditioned reflex or neither of the two:
Lifting up a book: …………………..
Reflex action is controlled by the
State whether the following is
Sneezing
Mention, if the following statement is True or False
Reflex action is a unit of nervous 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.
The given diagrammatic representation of reflex action shows knee jerk reflex.
Identify the parts labeled as A to E and select the correct option.
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
