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प्रश्न
Give three examples of reflex actions.
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उत्तर
Coughing, yawning and blinking of eyes are examples of reflex actions.
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संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
Briefly explain the following terms : Reflex action
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
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
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
Differentiate between the following pair of terms:
Stimulus and impulse
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
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: …………….
State whether the following is simple reflex, conditioned reflex or neither of the two:
Blushing: ……………….
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
State whether the following is
Blinking
What type of reflex is the following?
Knitting and swimming
Reflex arc allows the rapid response of the body to a stimulus.
The reflex arc which is made up of one sensory and one motor neuron is ______
Reflex actions are mediated through ____________.
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the following questions.
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- Name the phenomenon shown in the figure and define the same.
- Identify the parts labelled as 1 and 2. Write one functional difference between these two.
- Name the bony protective covering and the membranous protective covering of the spinal cord.
- Label the guidelines 3 and 4.
- How is the labelled part 3 different from part 4 with respect to its composition (part of neuron)?
- Give the technical term for the point of contact between the two nerve cells.
- Name the fluid filled inside the central canal of spinal cord.
- Name the term used for a small gap between two neurons.
- Give one example of a neurotransmitter.
- Draw a neat diagram of a nerve cell and label the parts: Perikaryon, Node of Ranvier, Myelin sheath and Axon terminals.
