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प्रश्न
Give the functions of medulla.
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उत्तर
The medulla controls various involuntary actions such as the heart beat, breathing, blood pressure and peristaltic movements of the alimentary canal.
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संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
With the help of a neat and labelled diagram, describe reflex arc.
Give examples of unconditional reflexes
Give three examples of reflex actions.
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.
Fill in the following blank with suitable word :
A neuron which carries an impulse to the brain is called a ........... neuron.
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
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
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
State whether the following is simple reflex, conditioned reflex or neither of the two:
Blushing: ……………….
Explain the mechanism of reflex action with the help of a suitable diagram.
Define the following:
Reflex action
State whether the following is
Constriction of pupil
What type of reflex is the following?
Solving mathematical sums
Mention, if the following statement is True or False
A reflex action is a spontaneous response to a stimulus.
Which one of the following is not a simple reflex?
Why have reflex arcs evolved in animals?
