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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 cells in your nasal passages which perceive the smell?
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उत्तर
Olfactory receptors present in our nasal passage perceive the smell.
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संबंधित प्रश्न
Briefly explain the following terms : Reflex action
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
One of the following controls the peristaltic movements of alimentary canal. This one is :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
All the voluntary actions of our body are controlled by :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
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
P is a cell (or group of cells) in the human body which is sensitive to a particular type of stimulus and conveys the messages to CNS through nerves Q. On the other hand, R is a part of the human body which can respond to a stimulus according to the instructions sent from the CNS through nerves S.
(a) What is P? Name five organs which contain cells (or group of cells) like P.
(b) Name the nerves Q.
(c) What is R? Give two examples of R.
(d) Name nerves S.
(e) How do messages travel through the nerves Q and S?
Differentiate between the following pair of terms:
Stimulus and impulse
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
List in tabular form two differences between reflex action and walking.
Define the following:
Reflex action
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
The sudden application of brakes without thinking
State whether the following is
Playing on the Keyboard
Give Technical Term:
The scientist, who conducted experiment on a dog to show conditioned reflex
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
Which of the following is not an involuntary action?
State whether the following is simple reflex, conditioned reflex or neither of the two.
Sneezing
