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प्रश्न
Which of the following is not a natural reflex action?
A. Knee-jerk
B. Blinking of eyes due to strong light
C. Salivation at the sight of food
D. Sneezing when any irritant enters the nose
उत्तर
Salivation at the sight of food
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संबंधित प्रश्न
Name the most important part of the human brain.
Give the functions of medulla.
Explain the difference between of the following pair of terms :
receptor and effector
Define reflex arc. Give the flow chart of a spinal reflex arc.
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 natural reflex and conditioned reflex. Give examples to illustrate your answer.
Define voluntary and reflex actions. Give examples of each.
List in tabular form two differences between reflex action and walking.
State whether the following is
Salivation when food is put in the mouth.
What type of reflex is the following?
Solving mathematical sums
