Reflex action - class-VIII
Who among the following discovered the conditioned reflexes?
Which one does not involve brain ?
Which biologist first noticed that the muscles of disected frog legs twitched wildly when a spark from an electric machine struck them?
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 barefoot 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.
Which of the following is not a reflex action?
The kneejerk reflex in response to a mallet tap over the patellar ligament
What is the advantage of reflex action ?
The reflex action was discovered by
Which of the following best characterize the simple response to simple stimuli?
In reflex action, the reflex is formed by
Which one is not a reflex action?
Reflex action (withdrawal of hand from heat source) is controlled by
Which controls reflex action ?
Which is required intact for sound reflex action
Which one of the following transmits impulses to central neural system?
Which is not a reflex action
A simple reflex is ___________________.
A sudden and spontaneous reflex which leads to the quick pulling of hand on touching a hot object is generated by
I. Brain
II. Spinal cord
III. Sensory neurons
IV. Motor neurons
Which one of the following is the complex reflex activity?
Mid brain has centre for reflex action of
The direction of response is opposite in which of the following reflex action?
Goose flesh in severe cold
Which of the following is not a component of the reflex?
Choose the correct answer from the alternatives given.
Which of the following are the first and last elements in a spinal reflex?