Advertisements
Advertisements
प्रश्न
Define the following:
Reflex action
Define the following term:
Reflex action
Define reflex action.
Advertisements
उत्तर
Reflex action is an automatic/quick/immediate, involuntary action in the body brought about by a stimulus. This mechanism prevents injury to the body by triggering a rapid and automatic response.
APPEARS IN
संबंधित प्रश्न
Give examples of unconditional reflexes
Name one gustatory receptor and one olfactory receptor present in human beings.
What is spinal cord? What is its main function?
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.
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
Which of the following is not an involuntary action?
(a) vomiting
(b) chewing
(c) heart beat
(d) salivation
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.
Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.
What is the difference between reflex action and voluntary action?
Explain the following term :
Conditioned reflex
State whether the following is
Constriction of pupil
What type of reflex is the following?
Formation of goose-pimples in cold weather.
Give Technical Term:
Response to a stimulus without the intervention of the will of an animal.
Mention, if the following statement is True or False
Reflex action involves brain
A change in the environment that causes an animal to react is called ______.
Which one of the following is not a simple reflex?
What kind of reflex is cycling?
