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प्रश्न
State whether the following is
Constriction of pupil
पर्याय
simple reflex
conditioned reflex
None of the above
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उत्तर
Simple reflex
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संबंधित 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?
Which of the following are cerebral reflexes?
(i) a person pulls away his hand on touching a hot object
(ii) a person spits out immediately when a fly enters his mouth while talking
(iii) A person walking bare foot lifts his foot at once on stepping on to a nail
(iv) A person's pupil contracts at once in the presence of bright light
(a) (i) and (ii) (b) (ii) and (iii) (c) (iii) and (iv) (d) (ii) and (iv)
The gustatory receptors of our body are in one of the following organs. This organ is :
a) ear
(b) nose
(c) tongue
(d) skin
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?
State whether the following is simple reflex, conditioned reflex or neither of the two:
Knitting without looking: …………………..
Give an example for conditioned reflexes.
Reflex actions are mediated through ____________.
Which of the following is not involved in Knee-jerk reflex?
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?
