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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
Which part of the brain maintains posture and equilibrium of the body?
Which of the following is not a natural reflex action?
A. Knee-jerk
B. Blinking of eyes due to strong light
C. Salivation at the sight of food
D. Sneezing when any irritant enters the nose
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
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.
A person walks across a room in barefeet and puts his foot on a drawing pin lying on the floor. He lets out a cry. Explain what happens in his nervous system in bringing about this response.
Explain the difference between of the following pair of terms :
receptor and effector
Which of the following helps in maintaining posture and balance of the human body?
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Receptor : Sensory nerve :: Motor nerve : ______.
Explain the mechanism of reflex action with the help of a suitable diagram.
List in tabular form two differences between reflex action and walking.
Define the following:
Reflex action
What is a reflex action?
Give one example of a conditioned reflex in your own life.
State whether the following is
The sudden application of brakes without thinking
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
Reflex actions are mediated through ____________.
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
What kind of reflex is cycling?
Categorise the following under stimulus and response.
Seeing a green light turning into red at a road crossing before applying the brakes.
