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प्रश्न
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the gland which is stimulated to secrete saliva.
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उत्तर
Salivary gland (effector) is stimulated to secrete saliva.
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संबंधित प्रश्न
What is the role of the brain in reflex action?
Give examples of unconditional reflexes
State one function each of cerebellum and pons.
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.
What are the various sense organs in our body?
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
Define reflex arc. Give the flow chart of a spinal reflex arc.
One of the following gives the correct sequence of the components in a reflex arc. This is:
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
Multiple choice question. Tick (✓) the correct choice:
Reflex actions occur under the control of
- brain
- medulla oblongata
- spinal cord
- cerebrum
State whether the following is simple reflex, conditioned reflex or neither of the two:
Blushing: ……………….
List in tabular form three distinguishing features between cerebrum and cerebellum.
Define the following:
Reflex action
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
Which one of the following is not a simple reflex?
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.
