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प्रश्न
What is spinal cord? What is its main function?
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उत्तर
The spinal cord is a part of the central nervous system. It is a cylindrical structure enclosed by a bony cage called the vertebral column. It is responsible for spinal reflex actions and the conduction of nerve impulses to and from the brain.
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संबंधित प्रश्न
Which part of the brain maintains posture and equilibrium of the body?
What is the role of the brain in reflex action?
Which part of the eye contains cells which are sensitive to light?
What are the various sense organs in our body?
Explain the difference between of the following pair of terms :
cerebrum and cerebellum
Which of the following cannot be considered a receptor?
(a) ear
(b) nose
(c) muscle
(d) eye
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
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
Your are driving your bicycle at a fast speed. Suddenly, a small boy comes in front of your cycle and, without wasting any time in thinking, you immediately apply the brakes and accident is avoided. What name is given to such an action?
State whether the following is simple reflex, conditioned reflex or neither of the two:
Sneezing: …………….
What is a reflex action?
Give one example of a conditioned reflex in your own life.
State whether the following is
Sneezing
State whether the following is
The sudden application of brakes without thinking
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Solving mathematical sums
What type of reflex is the following?
Blinking of the eye
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?
