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प्रश्न
Fill in the following blank with suitable word :
A neuron which carries an impulse to the brain is called a ........... neuron.
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उत्तर
A neuron which carries an impulse to the brain is called a sensory neuron.
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संबंधित प्रश्न
What is the role of the brain in reflex action?
The diagram given below shows the internal structure of a spinal cord depicting a phenomenon. Study the diagram and answer the questions:
1) Name the phenomenon that is depicted in the diagram. Define the phenomenon.
2) Give the technical term for the point of contact between the two nerve cells.
3) Name the parts numbered 1, 2 and 3.
4) How does the arrangement of neurons in the spinal cord differ from that of the brain?
5) Mention two ways by which the spinal cord is protected in our body.
Give the functions of medulla.
Explain the difference between of the following pair of terms :
receptor and effector
When you smell a favourite food your mouth begins to water (that is, you secrete saliva). Write down what is the example of the cells in your nasal passages which perceive the smell?
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
The part of brain which controls the involuntary action such as heart beat, breathing, blood pressure, etc. is :
(a) pons
(b) medulla
(c) cerebrum
(d) cerebellum
Differentiate between the following pair of terms:
Stimulus and impulse
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
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: ……………….
Two hungry boys (A and B) enter a restaurant and find a table decorated as follows:
Boy B starts salivating but not A. Explain the reason for this difference.
Reflex action is controlled by the
State whether the following is simple reflex, conditioned reflex or neither of the two.
Lifting up a book
State whether the following is
Blinking
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Solving mathematical sums
A change in the environment that causes an animal to react is called ______.
Why have reflex arcs evolved in animals?
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
