what is deplorisation and repolarisation of axonal membrane

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ECG depicts the depolarisation and repolarisation process during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.
(a) Depolarisation of atria
(b) Repolarisation of atria
(c) Depolarisation of ventricles
(d) Repolarisation of ventricles

On stimulation of axon membrane, the spot becomes depolarised and is termed as the region of ___

Q. Match the Column - I with Column - II.

	Column I		Column II
A	P-wave	1	Depolarisation of ventricles
B	QRS complex	2	Repolarisation of ventricles
C	T-wave	3	Coronary ischemia
D	Inversion of T-wave	4	Depolarisation of atria
		5	Repolarisation of atria

Q. Rearrange the following in the correct sequence pertaining to what is given within brackets at the end.
(a) Effector Sensory neuron Receptor Motor neuron Stimulus Central nervous system Response (Reflex arc)
(b) Repolarisation Depolarisation Resting (polarised) (during conduction of nerve impulse through a nerve fibre)
(c) Axon endings Nucleus Dendrites Axon Perikaryon Dendron (Neuron structure)
(d) Diencephalon Cerebellum Medulla oblongata Pons Cerebrum mid brain (sequence of parts of human brain).

Q. ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the following is not represented.

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