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प्रश्न
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
उत्तर
(b) medulla
The medulla controls various involuntary actions such as the heart beat, breathing, blood pressure and the peristaltic movement in the body.
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संबंधित प्रश्न
Briefly explain the following terms : Reflex action
Name one gustatory receptor and one olfactory receptor present in human beings.
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.
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
State whether the following is simple reflex, conditioned reflex or neither of the two.
Lifting up a book
What type of reflex is the following?
Blinking of the eye
Mention, if the following statement is True or False
A reflex action is a spontaneous response to a stimulus.
The reflex arc which is made up of one sensory and one motor neuron is ______
If after cutting through dorsal root of a spinal nerve of a mammal, the associated receptor in skin was stimulated the animal would ______.
