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Organisation of the PNS

Match the def...

Question

Match the definition to the apt term in the list given below:
The principle that transmission of an impulse is either at full strength or not at all- ______________
all-or-none law, colour vision, afferent nerves, efferent nerves, fovea centralis impulse, macula lutea, myopia, neuron reflex, statoreceptor, visual acuity meninges, blind spot

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Solution

All-or-none -The principle that transmission of an impulse is either at full strength or not at all.

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Q. Match the terms to these definitions:
all-or-none law, colour vision, afferent nerves, efferent nerves, fovea centralis, impulse, macula lutea, myopia, neuron, reflex, statoreceptor, visual acuity, meninges, blind spot
.......... is a wave of excitation transmitted through a nerve that results in physiological activity

Q. Match the terms to these definitions:
all-or-none law, colour vision, afferent nerves, efferent nerves, fovea centralis, impulse, macula lutea, myopia, neuron, reflex, statoreceptor, visual acuity, meninges, blind spot
.......... are the nerves which conduct nerve impulses from the central nervous system to the peripheral organs and tissues.

Q. Match the terms to these definitions.
all-or-none law, colour vision, afferent nerves, efferent nerves, fovea centralis, impulse, macula lutea, myopia, neuron, reflex, statoreceptor, visual acuity, meninges, blind spot.
.......... The ability to discriminate light on the basis of wavelength composition.

Q. Match the terms to these definitions.

Colour vision , Afferent nerves, Efferent nerves, Fovea centralis , Impulse macula lutea, Myopia, Neuron reflex, Statoreceptor, Visual acuity, Meninges, Blind spot

.......... place on the retina of the eye that is insensitive to light, where the optic nerve passes through the eye balls inner surface.

Identify the incorrect statement(s) regarding the components of PNS.

I. The nerves carrying impulses from CNS to peripheral system are sensory nerves or afferent nerves

II. The nerves carrying impulses from peripheral system to CNS are motor nerves or efferent nerves

III. Afferent nerves bring in impulses from the auditory, visual and touch receptors.

IV. Efferent nerves coordinates impulses towards effector organs.

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