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प्रश्न
How do we detect the smell of an agarbatti (incense stick)?
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उत्तर
When the smell of the incense stick reaches our nose, then the factory receptors present in our nose detect it and send this information to the forebrain in the form of electrical signals. The brain interprets this information as the smell of incense sticks where it is already stored.
संबंधित प्रश्न
How are involuntary actions and reflex actions different from each other?
Name one gustatory receptor and one olfactory receptor present in human beings.
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.
What are the various sense organs in our body?
What is spinal cord? What is its main function?
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
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?
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
Which of the following is not an involuntary action?
(a) vomiting
(b) chewing
(c) heart beat
(d) salivation
Which of the following statements is correct about receptors?
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
A cylindrical structure P in our body begins in continuation with medulla and extends downwards. It is enclosed in a bony cage Q and surrounded by membranes R. As many as x pairs of nerves arise from the structure P. The structure P is involved in the reflex actions of our body and conduction of nerve impulses to and from another organ S of our body with which it forms CNS.
(a) Name the structure P.
(b) Name (i) bony cage Q, and (ii) membranes R.
(c) How much is x?
(d) Name the organs S.
(e) What are the reflexes involving structure P only known as?
With the help of suitable example, describe reflex action.
Give one example of a conditioned reflex in your own life.
What type of reflex is the following?
Solving mathematical sums
Which one of the following is not a simple reflex?
Which of the following is not an involuntary action?
Categorise the following under stimulus and response.
Pain in the eye if something falls into it.
