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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 smell of the food?
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उत्तर
The smell of food is a stimulus.
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संबंधित प्रश्न
If we happen to touch a hot object unknowingly, we immediately pull back our hand. What is this type of action known as?
Write the names of the regions in hindbrain. Give one function of each region.
Name the function of cerebrum.
What is a reflex action? Explain with the help of an example.
Cerbellum, medulla and pons are the parts of :
(a) mid-brain
(b) hind-brain
(c) forebrain
(d) spinal cord
Which of the following statements are true?
(i) sudden action in response to something in the environment is called reflex action
(ii) sensory neurons carry electrical signals from spinal cord to muscles in a reflex action
(iii) motor neurons carry signals from receptors to spinal cord in a reflex action
(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action
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?
Differentiate between the following pair of terms:
Stimulus and impulse
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
What is the difference between reflex action and voluntary action?
Explain the following term :
Conditioned reflex
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
Complete the following sentence with appropriate Word
The control of reflex action is through:
Complete the following sentence with appropriate Word
Which of the following is not a natural reflex action?
In reflex action, the reflex arc is formed by ______
Reflex arc allows the rapid response of the body to a stimulus.
The given diagrammatic representation of reflex action shows knee jerk reflex.
Identify the parts labeled as A to E and select the correct option.
How is the mode of action in beating of the heart different from reflex actions? Give four examples.
Why have reflex arcs evolved in animals?
