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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
Give the functions of medulla.
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?
Which of the following helps in maintaining posture and balance of the human body?
The involuntary actions in the body are controlled by :
(a) medulla in forebrain
(b)medulla in hindbrain
(c) medulla in spinal cord
(d) medulla in midbrain
All the voluntary actions of our body are controlled by :
(a) cerebrum
(b) cerebellum
(c) pons
(d) medulla
Which of the following statements is correct about receptors?
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
When we touch a hot plate unknowingly, then this heat is sensed by a receptor P present in our fingers. The receptor triggers and impulse in neuron Q which transmits the message to an organ R which is a part of the central nervous system. Here the impulse is passed on to a neuron S which in turn passes it to a yet another neuron T. The neuron T passes the impulse to a tissue U in our arm. The tissue U then contracts and pulls our hand away from the hot plate.
(a) What is the name of (i) receptor P (ii) neuron Q, and (iii) organ R?
(b) What is (i) neuron S, and (ii) neuron T?
(c) Name the tissue U.
(d) What name is given to the phenomenon in which hand is pulled away quickly from the hot plate?
(e) Name the effector in this whole process.
Write down the following activities in the correct order for a simple reflex arc:
(a) impulse travels in the motor fibre
(b) impulse travels in the sensory fibre
(c) effector organ stimulated
(d) impulse crosses the synapse
State whether the following is simple reflex, conditioned reflex or neither of the two.
Blushing
State whether the following is
Constriction of pupil
What type of reflex is the following?
Sweating in summer
Mention, if the following statement is True or False
Reflex action involves brain
Mention, if the following statement is True or False
Reflex action is a unit of nervous action
Complete the following sentence with appropriate Word
A reflex arc in man is best described as movement of stimuli from:
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.
Categorise the following under stimulus and response.
Withdrawal of hand on touching a hot plate
